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  • mod_mono 'Service Temporarily Unavailable' issue

    - by Charlie Somerville
    I've deployed an ASP.NET web application on a Linux (Debian) server running Apache 2.2 and mod_mono 1.9 It's working well, however Mono occasionally segfaults and uses the entire CPU which causes the website to stop working and display 'Service Temporarily Unavailable' Killing mono fixes it, but obviously this isn't a good solution. I tailed the system log after this happened and I saw the following error messages from the kernel: Apr 20 01:49:37 charliesomerville kernel: [1596436.204158] mono[17909]: segfault at b645f671 ip b645f671 sp b4ffb604 error 4<6>mono[19047]: segfault at b645f66e ip b645f66e sp b4bf7604 error 4<6>mono[18017]: segfault at b645f66e ip b645f66e sp b52fe604 error 4<6>mono[19668]: segfault at b645f5e6 ip b645f5e6 sp b48f4604 error 4<6>mono[22565]: segfault at b645f674 ip b645f674 sp b45f1604 error 4<6>mono[17700]: segfault at b645f661 ip b645f661 sp b51fd604 error 4<6>mono[19596]: segfault at b645f5e6 ip b645f5e6 sp b49f5604 error 4 Apr 20 01:49:37 charliesomerville kernel: [1596436.208172] mono[23219]: segfault at b645f66e ip b645f66e sp b44f0604 error 4 At the end of Apache's error.log are the following errors: [Tue Apr 20 03:10:23 2010] [error] (70014)End of file found: read_data failed [Tue Apr 20 03:10:23 2010] [error] Command stream corrupted, last command was 1 [Tue Apr 20 03:10:23 2010] [error] Command stream corrupted, last command was 1 [Tue Apr 20 03:10:23 2010] [error] Command stream corrupted, last command was 1 System.ArgumentNullException: null key Parameter name: key at System.Collections.Hashtable.get_Item (System.Object key) [0x00000] at System.Runtime.Serialization.SerializationCallbacks.GetSerializationCallbacks (System.Type t) [0x00000] at System.Runtime.Serialization.ObjectManager.RaiseOnDeserializingEvent (System.Object obj) [0x00000] at System.Runtime.Serialization.Formatters.Binary.ObjectReader.ReadObjectContent (System.IO.BinaryReader reader, System.Runtime.Serialization.Formatters.Binary.TypeMetadata metadata, Int64 objectId, System.Object& objectInstance, System.Runtime.Serialization.SerializationInfo& info) [0x00000] at System.Runtime.Serialization.Formatters.Binary.ObjectReader.ReadObjectInstance (System.IO.BinaryReader reader, Boolean isRuntimeObject, Boolean hasTypeInfo, System.Int64& objectId, System.Object& value, System.Runtime.Serialization.SerializationInfo& info) [0x00000] at System.Runtime.Serialization.Formatters.Binary.ObjectReader.ReadObject (BinaryElement element, System.IO.BinaryReader reader, System.Int64& objectId, System.Object& value, System.Runtime.Serialization.SerializationInfo& info) [0x00000] at System.Runtime.Serialization.Formatters.Binary.ObjectReader.ReadNextObject (System.IO.BinaryReader reader) [0x00000] at System.Runtime.Serialization.Formatters.Binary.ObjectReader.ReadObjectGraph (System.IO.BinaryReader reader, Boolean readHeaders, System.Object& result, System.Runtime.Remoting.Messaging.Header[]& headers) [0x00000] at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.NoCheckDeserialize (System.IO.Stream serializationStream, System.Runtime.Remoting.Messaging.HeaderHandler handler) [0x00000] at System.Runtime.Serialization.Formatters.Binary.BinaryFormatter.Deserialize (System.IO.Stream serializationStream) [0x00000] at System.Runtime.Remoting.Channels.CADSerializer.DeserializeObject (System.IO.MemoryStream mem) [0x00000] at System.Runtime.Remoting.RemotingServices.GetDomainProxy (System.AppDomain domain) [0x00000] at System.AppDomain.CreateDomain (System.String friendlyName, System.Security.Policy.Evidence securityInfo, System.AppDomainSetup info) [0x00000] at System.Web.Hosting.ApplicationHost.CreateApplicationHost (System.Type hostType, System.String virtualDir, System.String physicalDir) [0x00000] at Mono.WebServer.VPathToHost.CreateHost (Mono.WebServer.ApplicationServer server, Mono.WebServer.WebSource webSource) [0x00000] at Mono.WebServer.ApplicationServer.GetApplicationForPath (System.String vhost, Int32 port, System.String path, Boolean defaultToRoot) [0x00000] at (wrapper remoting-invoke-with-check) Mono.WebServer.ApplicationServer:GetApplicationForPath (string,int,string,bool) at Mono.WebServer.ModMonoWorker.GetOrCreateApplication (System.String vhost, Int32 port, System.String filepath, System.String virt) [0x00000] at Mono.WebServer.ModMonoWorker.InnerRun (System.Object state) [0x00000] at Mono.WebServer.ModMonoWorker.Run (System.Object state) [0x00000] [Tue Apr 20 03:10:26 2010] [error] (70014)End of file found: read_data failed [Tue Apr 20 03:10:26 2010] [error] Command stream corrupted, last command was -1 Along with the above errors, Apache's error.log is packed with hundreds (if not thousands) of the following error: Maximum number (20) of concurrent mod_mono requests to /tmp/mod_mono_dashboard_default_2.lock reached. Droping request. At the moment, I'm thinking there might be something wrong with configuration here (it's basically running on out-of-the-box config)

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  • Virtualhost entries gets over-written when apache httpd.conf is rebuilt

    - by Amitabh
    Background: We have been trying to get a wildcard SSL working on multiple sub domains on a single dedicated address.. We have two sub domains next.my-personal-website.com and blog.my-personal-website.com Part of our strategy has been to edit the httpd.conf and add the NameVirtualHost xx.xx.144.72:443 directive and the virtualhost entries for port 443 for the subdomains there. This works good if we just edit the httpd.conf, add the entries, save it and restart the apache. The problem: But if we add a new sub domain from cpanel or we run the # /usr/local/cpanel/bin/apache_conf_distiller --update # /scripts/rebuildhttpdconf the virtualhost entries that we added manually are no more there in the newly generated httpd.conf file. Only the virtualhost entry for the main domain for port 443 that was there before we made edits to the httpd.conf is there(assuming we are not discussing virtualhost entries for port 80). I understand we need to put the new virtualhost entries in some include files as mentioned here in the cpanel documentation. But am not sure where to. So the question would be where do I put the NameVirtualHost xx.xx.144.72:443 directive and the two virtualhost directive for port 443, so that they are not overwritten when httpd.conf is rebuilt/regenerated later. Virtualhost entries: The two virtualhost entries for the subdomains are: <VirtualHost xx.xx.144.72:443> ServerName next.my-personal-website.com ServerAlias www.next.my-personal-website.com DocumentRoot /home/myguardi/public_html/next.my-personal-website.com ServerAdmin [email protected] UseCanonicalName On CustomLog /usr/local/apache/domlogs/next.my-personal-website.com combined CustomLog /usr/local/apache/domlogs/next.my-personal-website.com-bytes_log "%{%s}t %I .\n%{%s}t %O ." ## User myguardi # Needed for Cpanel::ApacheConf <IfModule mod_suphp.c> suPHP_UserGroup myguardi myguardi </IfModule> <IfModule !mod_disable_suexec.c> SuexecUserGroup myguardi myguardi </IfModule> ScriptAlias /cgi-bin/ /home/myguardi/public_html/next.my-personal-website.com/cgi-bin/ SSLEngine on SSLCertificateFile /etc/ssl/certs/my-personal-website.com.crt SSLCertificateKeyFile /etc/ssl/private/my-personal-website.com.key SSLCACertificateFile /etc/ssl/certs/my-personal-website.com.cabundle CustomLog /usr/local/apache/domlogs/next.my-personal-website.com-ssl_log combined SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown <Directory "/home/myguardi/public_html/cgi-bin"> SSLOptions +StdEnvVars </Directory> and <VirtualHost xx.xx.144.72:443> ServerName blog.my-personal-website.com ServerAlias www.blog.my-personal-website.com DocumentRoot /home/myguardi/public_html/blog.my-personal-website.com ServerAdmin [email protected] UseCanonicalName On CustomLog /usr/local/apache/domlogs/blog.my-personal-website.com combined CustomLog /usr/local/apache/domlogs/blog.my-personal-website.com-bytes_log "%{%s}t %I .\n%{%s}t %O ." ## User myguardi # Needed for Cpanel::ApacheConf <IfModule mod_suphp.c> suPHP_UserGroup myguardi myguardi </IfModule> <IfModule !mod_disable_suexec.c> SuexecUserGroup myguardi myguardi </IfModule> ScriptAlias /cgi-bin/ /home/myguardi/public_html/blog.my-personal-website.com/cgi-bin/ SSLEngine on SSLCertificateFile /etc/ssl/certs/my-personal-website.com.crt SSLCertificateKeyFile /etc/ssl/private/my-personal-website.com.key SSLCACertificateFile /etc/ssl/certs/my-personal-website.com.cabundle CustomLog /usr/local/apache/domlogs/blog.my-personal-website.com-ssl_log combined SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown <Directory "/home/myguardi/public_html/cgi-bin"> SSLOptions +StdEnvVars </Directory> and the automatically generated virtualhost entry for the main domain for port 443 is <VirtualHost xx.xx.144.72:443> ServerName my-personal-website.com ServerAlias www.my-personal-website.com DocumentRoot /home/myguardi/public_html ServerAdmin [email protected] UseCanonicalName Off CustomLog /usr/local/apache/domlogs/my-personal-website.com combined CustomLog /usr/local/apache/domlogs/my-personal-website.com-bytes_log "%{%s}t %I .\n%{%s}t %O ." ## User myguardi # Needed for Cpanel::ApacheConf <IfModule mod_suphp.c> suPHP_UserGroup myguardi myguardi </IfModule> <IfModule !mod_disable_suexec.c> SuexecUserGroup myguardi myguardi </IfModule> ScriptAlias /cgi-bin/ /home/myguardi/public_html/cgi-bin/ SSLEngine on SSLCertificateFile /etc/ssl/certs/my-personal-website.com.crt SSLCertificateKeyFile /etc/ssl/private/my-personal-website.com.key SSLCACertificateFile /etc/ssl/certs/my-personal-website.com.cabundle CustomLog /usr/local/apache/domlogs/my-personal-website.com-ssl_log combined SetEnvIf User-Agent ".*MSIE.*" nokeepalive ssl-unclean-shutdown <Directory "/home/myguardi/public_html/cgi-bin"> SSLOptions +StdEnvVars </Directory> # To customize this VirtualHost use an include file at the following location # Include "/usr/local/apache/conf/userdata/ssl/2/myguardi/my-personal-website.com/*.conf" I really appreciate if somebody can tell me how to proceed on this. Thank you. Update: Include directives present are: `Include "/usr/local/apache/conf/includes/pre_main_global.conf" Include "/usr/local/apache/conf/includes/pre_main_2.conf" Include "/usr/local/apache/conf/php.conf" Include "/usr/local/apache/conf/includes/errordocument.conf" Include "/usr/local/apache/conf/modsec2.conf" Include "/usr/local/apache/conf/includes/pre_virtualhost_global.conf" Include "/usr/local/apache/conf/includes/pre_virtualhost_2.conf" ` These are the entries that are generated before any virtualhost entry is defined. Towards the end of the httpd.conf file , the following two entries are added Include "/usr/local/apache/conf/includes/post_virtualhost_global.conf" Include "/usr/local/apache/conf/includes/post_virtualhost_2.conf" The older httpd.conf file before we added the virtualhost entries for sub domains for port 443 can be viewed here

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  • after enabling mod ssl apache stops listening on port 80

    - by zensys
    I have an ubuntu 12.04 server with zend server CE installed. I now wanted to enable https but after the first steps according to the documentation, 'a2enmod ssl' and 'apache service restart', apache does not listen on 443 but neither on 80, according to netstat -tap | grep http(s)! This is what I see in my error log, but I can't make much of it: [Fri May 25 19:52:39 2012] [notice] caught SIGTERM, shutting down [Fri May 25 19:52:41 2012] [warn] Init: Session Cache is not configured [hint: SSLSessionCache] [Fri May 25 19:52:41 2012] [notice] ModSecurity for Apache/2.6.3 (http://www.modsecurity.org/) configured. [Fri May 25 19:52:41 2012] [notice] ModSecurity: APR compiled version="1.4.5"; loaded version="1.4.6" [Fri May 25 19:52:41 2012] [warn] ModSecurity: Loaded APR do not match with compiled! [Fri May 25 19:52:41 2012] [notice] ModSecurity: PCRE compiled version="8.12"; loaded version="8.12 2011-01-15" [Fri May 25 19:52:41 2012] [notice] ModSecurity: LUA compiled version="Lua 5.1" [Fri May 25 19:52:41 2012] [notice] ModSecurity: LIBXML compiled version="2.7.8" [Fri May 25 19:53:11 2012] [notice] ModSecurity for Apache/2.6.3 (http://www.modsecurity.org/) configured. [Fri May 25 19:53:11 2012] [notice] ModSecurity: APR compiled version="1.4.5"; loaded version="1.4.6" [Fri May 25 19:53:11 2012] [warn] ModSecurity: Loaded APR do not match with compiled! [Fri May 25 19:53:11 2012] [notice] ModSecurity: PCRE compiled version="8.12"; loaded version="8.12 2011-01-15" [Fri May 25 19:53:11 2012] [notice] ModSecurity: LUA compiled version="Lua 5.1" [Fri May 25 19:53:11 2012] [notice] ModSecurity: LIBXML compiled version="2.7.8" [Fri May 25 19:53:12 2012] [notice] Apache/2.2.22 (Ubuntu) PHP/5.3.8-ZS5.5.0 configured -- resuming normal operations and here is my httpd.conf: # Name based virtual hosting <virtualhost *:80> ServerName www-redirect KeepAlive Off RewriteEngine On RewriteCond %{HTTP_HOST} ^[^\./]+\.[^\./]+$ RewriteRule ^/(.*)$ http://www.%{HTTP_HOST}/$1 [R=301,L] </virtualhost> Alias /shared/js "/home/web/library/js" Alias /shared/image "/home/web/library/image" <IfModule mod_expires.c> <FilesMatch "\.(jpe?g|png|gif|js|css|doc|rtf|xls|pdf)$"> ExpiresActive On ExpiresDefault "access plus 1 week" </FilesMatch> </IfModule> ErrorLog ${APACHE_LOG_DIR}/error.log LogLevel warn <Directory /> Options FollowSymLinks AllowOverride None Order allow,deny allow from all </Directory> <Location /> RewriteEngine On RewriteCond %{REQUEST_FILENAME} -s [OR] RewriteCond %{REQUEST_FILENAME} -l [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^.*$ - [NC,L] RewriteRule ^.*$ /index.php [NC,L] </Location> netstat -tap gives: Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 *:mysql *:* LISTEN 765/mysqld tcp 0 0 *:pop3 *:* LISTEN 744/dovecot tcp 0 0 *:imap2 *:* LISTEN 744/dovecot tcp 0 0 *:http *:* LISTEN 19861/apache2 tcp 0 0 *:smtp *:* LISTEN 30365/master tcp 0 0 *:4444 *:* LISTEN 634/sshd tcp 0 0 *:kamanda *:* LISTEN 1167/lighttpd tcp 0 0 *:imaps *:* LISTEN 744/dovecot tcp 0 0 *:amandaidx *:* LISTEN 1167/lighttpd tcp 0 0 localhost.loc:amidxtape *:* LISTEN 19861/apache2 tcp 0 0 *:pop3s *:* LISTEN 744/dovecot tcp 0 384 mail.mysite.:4444 231.214.14.37.dyn:41909 ESTABLISHED 19039/sshd: web [pr tcp 0 0 localhost.localdo:mysql localhost.localdo:48252 ESTABLISHED 765/mysqld tcp 0 0 mail.mysite.:http 231.214.14.37.dyn:54686 TIME_WAIT - tcp 0 0 mail.mysite.:4444 231.214.14.37.dyn:42419 ESTABLISHED 19372/sshd: web [pr tcp 0 0 localhost.localdo:48252 localhost.localdo:mysql ESTABLISHED 19884/auth tcp 0 0 mail.mysite.:http 231.214.14.37.dyn:54685 TIME_WAIT - tcp6 0 0 [::]:pop3 [::]:* LISTEN 744/dovecot tcp6 0 0 [::]:imap2 [::]:* LISTEN 744/dovecot tcp6 0 0 [::]:smtp [::]:* LISTEN 30365/master tcp6 0 0 [::]:4444 [::]:* LISTEN 634/sshd tcp6 0 0 [::]:imaps [::]:* LISTEN 744/dovecot tcp6 0 0 [::]:pop3s [::]:* LISTEN 744/dovecot Anyone knows what I am doing wrong? Perhaps I should take some additional steps to make apache listen 0n 443 but that it stops listening on 80 altogether I can't understand.

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  • How to restore Linode to Vagrant VM?

    - by Iain Elder
    I'm trying to set up a Linux development environment so I can safely make changes to my website without breaking the live site. Linode hosts my live site. A simple solution would be to host my development server on Linode as well, but I want to avoid doubling my hosting costs. The cheapest way I see is to use Vagrant on my Windows workstation to host my development environment. After I attempt to restore the backup to Vagrant and reboot the VM, I can no longer ssh into the Vagrant host. It's probably because by restoring the backup I overwrite some special Vagrant configuration, but I'm not sure how to avoid that. How do I make this approach work? If my approach is fundamentally wrong, can you suggest an alternative? Creating the backup On the Linode I used these commands to create a compressed copy of the entire filesystem, while ignoring things that shouldn't be included in the backup: $ sudo rsync -ahvz --exclude={/dev/*,/proc/*,/sys/*,/tmp/*,/run/*,/mnt/*,/backup/*} /* /backup/2 $ sudo tar -czf /backup/2.gz /backup/2 The backup file is called 2.gz because this is thesecond backup. The first backup is called 1.gz. I use WinSCP to copy the backup file to my Windows workstation. Setting up the Vagrant host I need a Vagrant box that matches my Linode operating system (Ubuntu 12.04.3 LTS, kernel 3.9.3). I selected the closet match from vagrantbox.es: Ubuntu Server Precise 12.04.3 amd64 Kernel is ready for Docker (Docker not included) On my workstation I ran these commands to add the box and initialize and boot an instance: $ vagrant box add ubuntu-precise http://nitron-vagrant.s3-website-us-east-1.amazonaws.com/vagrant_ubuntu_12.04.3_amd64_virtualbox.box $ mkdir linode-test $ cd linode-test $ vagrant init ubuntu-precise $ vagrant up Now Vagrant is running a machine with SSH on port 2222. The operating system version is the same. The kernel version is 3.8.0. Sounds close enough. Restoring the backup With WinSCP I copied the backup file 2.gz to /home/vagrant/2.gz on the Vagrant box. With PuTTY I connected via ssh to my new Vagrant box: On the box move the backup to the filesystem root. $ sudo mv 2.gz / Extract the archive to the filesystem root: $ sudo tar -xvpz -f 2.gz -C / --strip-components=2 (I discovered I need to use strip components because all files in the archive have the prefix backup/2/. I'll fix this for the next backup.) After the tar command completes, I log out of the box. Testing the backup When I try to log in again, it doesn't let me log in as vagrant with a password any more. It does let me log in as iain, my user on the live Linode, with a password. That surprised me because I disabled password authentication on my live Linode. I figured that I have to restart the ssh service for the change to take effect. Instead of restarting just ssh, I chose to restart the whole system. Now I can't even get to the login screen. PuTTY says "connection refused" when I try to connect. What went wrong?

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  • ServerAlias not working

    - by Janis Peisenieks
    I have a VPS, that I have configured to host multiple websites with name based hosting. It is all good while only using example.com, and www.example.com. It also works with example.net, but when I try example.net, it reverts to my default site configuration, which just shows my default (empty) index.html page. Here's the default file: <VirtualHost *:80> ServerAdmin webmaster@localhost DocumentRoot /var/www <Directory /> Options FollowSymLinks AllowOverride None </Directory> <Directory /var/www/> Options Indexes FollowSymLinks MultiViews AllowOverride All Order allow,deny allow from all </Directory> ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI -MultiViews +SymLinksIfOwnerMatch Order allow,deny Allow from all </Directory> ErrorLog /var/log/apache2/error.log # Possible values include: debug, info, notice, warn, error, crit, # alert, emerg. LogLevel warn CustomLog /var/log/apache2/access.log combined Alias /doc/ "/usr/share/doc/" <Directory "/usr/share/doc/"> Options Indexes MultiViews FollowSymLinks AllowOverride None Order deny,allow Deny from all Allow from 127.0.0.0/255.0.0.0 ::1/128 </Directory> </VirtualHost> Here's a configuration for the example.com site: <VirtualHost *:80> ServerAdmin [email protected] ServerName example.com ServerAlias www.example.com DocumentRoot /srv/www/example.com/public_html/ ErrorLog /srv/www/example.com/logs/error.log CustomLog /srv/www/example.com/logs/access.log combined <Directory /srv/www/example.com/public_html/> AllowOverride All Order allow,deny allow from all </Directory> </VirtualHost> And here is the config for the example.net site: <VirtualHost *:80> ServerAdmin [email protected] ServerName example.net ServerAlias www.example.net DocumentRoot /srv/www/example.net/public_html/ ErrorLog /srv/www/example.net/logs/error.log CustomLog /srv/www/example.net/logs/access.log combined <Directory /srv/www/example.net/public_html/> AllowOverride All Order allow,deny allow from all </Directory> </VirtualHost> Where could the problem be? I believe, that there is something going wrong with the ServerAlias property. Could it be because of the way the site's are built? Because example.com is a Joomla site, and example.net is a Zend Framework site. Just in case, I'll also insert the .htaccess files for example.net, since example.com has it's disabled: example.net: SetEnv APPLICATION_ENV development RewriteRule ^(browse|config).* - [L] ErrorDocument 500 /error-docs/500.shtml SetEnv CACHE_OFFSET 2678400 <FilesMatch "\.(ico|pdf|flv|jpg|jpeg|png|gif|js|css|swf)$"> Header set Expires "Fri, 25 Sep 2037 19:30:32 GMT" Header unset ETag FileETag None </FilesMatch> RewriteEngine On RewriteRule ^(adm|statistics) - [L] RewriteRule ^/public/(.*)$ http://example.net/$1 [R] RewriteRule ^(.*)$ public/$1 [L] Any help would be greatly appreciated! Edit So that my question is ABSOLUTELY clear: The problem is, that one site works with both www prefix as well as without it, and the second one does not. I would like to know how to enable the second site to work with www prefix as well.

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  • vSphere ESX 5.5 hosts cannot connect to NFS Server

    - by Gerald
    Summary: My problem is I cannot use the QNAP NFS Server as an NFS datastore from my ESX hosts despite the hosts being able to ping it. I'm utilising a vDS with LACP uplinks for all my network traffic (including NFS) and a subnet for each vmkernel adapter. Setup: I'm evaluating vSphere and I've got two vSphere ESX 5.5 hosts (node1 and node2) and each one has 4x NICs. I've teamed them all up using LACP/802.3ad with my switch and then created a distributed switch between the two hosts with each host's LAG as the uplink. All my networking is going through the distributed switch, ideally, I want to take advantage of DRS and the redundancy. I have a domain controller VM ("Central") and vCenter VM ("vCenter") running on node1 (using node1's local datastore) with both hosts attached to the vCenter instance. Both hosts are in a vCenter datacenter and a cluster with HA and DRS currently disabled. I have a QNAP TS-669 Pro (Version 4.0.3) (TS-x69 series is on VMware Storage HCL) which I want to use as the NFS server for my NFS datastore, it has 2x NICs teamed together using 802.3ad with my switch. vmkernel.log: The error from the host's vmkernel.log is not very useful: NFS: 157: Command: (mount) Server: (10.1.2.100) IP: (10.1.2.100) Path: (/VM) Label (datastoreNAS) Options: (None) cpu9:67402)StorageApdHandler: 698: APD Handle 509bc29f-13556457 Created with lock[StorageApd0x411121] cpu10:67402)StorageApdHandler: 745: Freeing APD Handle [509bc29f-13556457] cpu10:67402)StorageApdHandler: 808: APD Handle freed! cpu10:67402)NFS: 168: NFS mount 10.1.2.100:/VM failed: Unable to connect to NFS server. Network Setup: Here is my distributed switch setup (JPG). Here are my networks. 10.1.1.0/24 VM Management (VLAN 11) 10.1.2.0/24 Storage Network (NFS, VLAN 12) 10.1.3.0/24 VM vMotion (VLAN 13) 10.1.4.0/24 VM Fault Tolerance (VLAN 14) 10.2.0.0/24 VM's Network (VLAN 20) vSphere addresses 10.1.1.1 node1 Management 10.1.1.2 node2 Management 10.1.2.1 node1 vmkernel (For NFS) 10.1.2.2 node2 vmkernel (For NFS) etc. Other addresses 10.1.2.100 QNAP TS-669 (NFS Server) 10.2.0.1 Domain Controller (VM on node1) 10.2.0.2 vCenter (VM on node1) I'm using a Cisco SRW2024P Layer-2 switch (Jumboframes enabled) with the following setup: LACP LAG1 for node1 (Ports 1 through 4) setup as VLAN trunk for VLANs 11-14,20 LACP LAG2 for my router (Ports 5 through 8) setup as VLAN trunk for VLANs 11-14,20 LACP LAG3 for node2 (Ports 9 through 12) setup as VLAN trunk for VLANs 11-14,20 LACP LAG4 for the QNAP (Ports 23 and 24) setup to accept untagged traffic into VLAN 12 Each subnet is routable to another, although, connections to the NFS server from vmk1 shouldn't need it. All other traffic (vSphere Web Client, RDP etc.) goes through this setup fine. I tested the QNAP NFS server beforehand using ESX host VMs atop of a VMware Workstation setup with a dedicated physical NIC and it had no problems. The ACL on the NFS Server share is permissive and allows all subnet ranges full access to the share. I can ping the QNAP from node1 vmk1, the adapter that should be used to NFS: ~ # vmkping -I vmk1 10.1.2.100 PING 10.1.2.100 (10.1.2.100): 56 data bytes 64 bytes from 10.1.2.100: icmp_seq=0 ttl=64 time=0.371 ms 64 bytes from 10.1.2.100: icmp_seq=1 ttl=64 time=0.161 ms 64 bytes from 10.1.2.100: icmp_seq=2 ttl=64 time=0.241 ms Netcat does not throw an error: ~ # nc -z 10.1.2.100 2049 Connection to 10.1.2.100 2049 port [tcp/nfs] succeeded! The routing table of node1: ~ # esxcfg-route -l VMkernel Routes: Network Netmask Gateway Interface 10.1.1.0 255.255.255.0 Local Subnet vmk0 10.1.2.0 255.255.255.0 Local Subnet vmk1 10.1.3.0 255.255.255.0 Local Subnet vmk2 10.1.4.0 255.255.255.0 Local Subnet vmk3 default 0.0.0.0 10.1.1.254 vmk0 VM Kernel NIC info ~ # esxcfg-vmknic -l Interface Port Group/DVPort IP Family IP Address Netmask Broadcast MAC Address MTU TSO MSS Enabled Type vmk0 133 IPv4 10.1.1.1 255.255.255.0 10.1.1.255 00:50:56:66:8e:5f 1500 65535 true STATIC vmk0 133 IPv6 fe80::250:56ff:fe66:8e5f 64 00:50:56:66:8e:5f 1500 65535 true STATIC, PREFERRED vmk1 164 IPv4 10.1.2.1 255.255.255.0 10.1.2.255 00:50:56:68:f5:1f 1500 65535 true STATIC vmk1 164 IPv6 fe80::250:56ff:fe68:f51f 64 00:50:56:68:f5:1f 1500 65535 true STATIC, PREFERRED vmk2 196 IPv4 10.1.3.1 255.255.255.0 10.1.3.255 00:50:56:66:18:95 1500 65535 true STATIC vmk2 196 IPv6 fe80::250:56ff:fe66:1895 64 00:50:56:66:18:95 1500 65535 true STATIC, PREFERRED vmk3 228 IPv4 10.1.4.1 255.255.255.0 10.1.4.255 00:50:56:72:e6:ca 1500 65535 true STATIC vmk3 228 IPv6 fe80::250:56ff:fe72:e6ca 64 00:50:56:72:e6:ca 1500 65535 true STATIC, PREFERRED Things I've tried/checked: I'm not using DNS names to connect to the NFS server. Checked MTU. Set to 9000 for vmk1, dvSwitch and Cisco switch and QNAP. Moved QNAP onto VLAN 11 (VM Management, vmk0) and gave it an appropriate address, still had same issue. Changed back afterwards of course. Tried initiating the connection of NAS datastore from vSphere Client (Connected to vCenter or directly to host), vSphere Web Client and the host's ESX Shell. All resulted in the same problem. Tried a path name of "VM", "/VM" and "/share/VM" despite not even having a connection to server. I plugged in a linux system (10.1.2.123) into a switch port configured for VLAN 12 and tried mounting the NFS share 10.1.2.100:/VM, it worked successfully and I had read-write access to it I tried disabling the firewall on the ESX host esxcli network firewall set --enabled false I'm out of ideas on what to try next. The things I'm doing differently from my VMware Workstation setup is the use of LACP with a physical switch and a virtual distributed switch between the two hosts. I'm guessing the vDS is probably the source of my troubles but I don't know how to fix this problem without eliminating it.

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  • Can't deploy rails 4 app on Bluehost with Passenger 4 and nginx

    - by user2205763
    I am at Bluehost (dedicated server) trying to run a rails 4 app. I asked to have my server re-imaged, specifying that I do not want rails, ruby, or passenger install automatically as I wanted to install the latest versions myself using a version manager (Bluehost by default offers rails 2.3, ruby 1.8, and passenger 3, which won't work with my app). I installed ruby 1.9.3p327, rails 4.0.0, and passenger 4.0.5. I can verify this by typing, "ruby -v", "rails -v", and "passenger -v" (also "gem -v"). I made sure to install these not as root, so that I don't get a 403 forbidden error when trying to deploy the app. I installed passenger by typing "gem install passenger", and then installed the nginx passenger module (into "/nginx") with "passenger-install-nginx-module". I am trying to run my rails app on a subdomain, http://development.thegraduate.hk (I am using the subdomain to show my client progress on the website). In bluehost I created that subdomain, and had it point to "public_html/thegraduate". I then created a symlink from "rails_apps/thegraduate/public" to "public_html/thegraduate" and verified that the symlink exists. The problem is: when I go to http://development.thegraduate.hk, I get a directory listing. There is nothing resembling a rails app. I have not added a .htaccess file to /rails_apps/thegraduate/public, as that was never specified in the installation of passenger. It was meant to be 'install and go'. When I type "passenger-memory-status", I get 3 things: - Apache processes (7) - Nginx processes (0) - Passenger processes (0) So it appears that nginx and passenger are not running, and I can't figure out how to get it to run (I'm not looking to have it run as a standalone server). Here is my nginx.conf file (/nginx/conf/nginx.conf): #user nobody; worker_processes 1; #error_log logs/error.log; #error_log logs/error.log notice; #error_log logs/error.log info; #pid logs/nginx.pid; events { worker_connections 1024; } http { passenger_root /home/thegrad4/.rbenv/versions/1.9.3-p327/lib/ruby/gems/1.9.1/gems/passenger-4.0.5; passenger_ruby /home/thegrad4/.rbenv/versions/1.9.3-p327/bin/ruby; include mime.types; default_type application/octet-stream; #log_format main '$remote_addr - $remote_user [$time_local] "$request" ' # '$status $body_bytes_sent "$http_referer" ' # '"$http_user_agent" "$http_x_forwarded_for"'; #access_log logs/access.log main; sendfile on; #tcp_nopush on; #keepalive_timeout 0; keepalive_timeout 65; #gzip on; server { listen 80; server_name development.thegraduate.hk; root ~/rails_apps/thegraduate/public; passenger_enabled on; #charset koi8-r; #access_log logs/host.access.log main; location / { root html; index index.html index.htm; } #error_page 404 /404.html; # redirect server error pages to the static page /50x.html # error_page 500 502 503 504 /50x.html; location = /50x.html { root html; } # proxy the PHP scripts to Apache listening on 127.0.0.1:80 # #location ~ \.php$ { # proxy_pass http://127.0.0.1; #} # pass the PHP scripts to FastCGI server listening on 127.0.0.1:9000 # #location ~ \.php$ { # root html; # fastcgi_pass 127.0.0.1:9000; # fastcgi_index index.php; # fastcgi_param SCRIPT_FILENAME /scripts$fastcgi_script_name; # include fastcgi_params; #} # deny access to .htaccess files, if Apache's document root # concurs with nginx's one # #location ~ /\.ht { # deny all; #} } # another virtual host using mix of IP-, name-, and port-based configuration # #server { # listen 8000; # listen somename:8080; # server_name somename alias another.alias; # location / { # root html; # index index.html index.htm; # } #} # HTTPS server # #server { # listen 443; # server_name localhost; # ssl on; # ssl_certificate cert.pem; # ssl_certificate_key cert.key; # ssl_session_timeout 5m; # ssl_protocols SSLv2 SSLv3 TLSv1; # ssl_ciphers HIGH:!aNULL:!MD5; # ssl_prefer_server_ciphers on; # location / { # root html; # index index.html index.htm; # } #} } I don't get any errors, just the directory listing. I've tried to be as detailed as possible. Any help on this issue would be greatly appreciated as I've been stumped for the past 3 days. Scouring the web has not helped as my issue seems to be specific to me. Thanks so much. If there are any potential details I forgot to specify, just ask. ** ADDITIONAL INFORMATION ** Going to development.thegraduate.hk/public/ will correctly display the index.html page in /rails_apps/thegraduate/public. However, changing root in the routes.rb file to "root = 'home#index'" does nothing.

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  • Backup a hosted Sharepoint

    - by David Mackintosh
    One of my customers has outsourced their Sharepoint and Exchange services to a hosted services provider. I believe it is a Sharepoint 2007 service. It is a shared hosting solution, so we do not have any kind of access to the server itself; we only have user-level and sharepoint-administrator-level access to the Sharepoint application. They have come to the point where they would like to have a copy of everything that is on the Sharepoint server. I have downloaded the Office Sharepoint Designer 2007, and it features three (!) ways to backup a Sharepoint server, none (!) of which work for me: File-Export-Personal Web Package: When selecting everything, it calculates a negative size. Barfs with No "content-type" in CGI environment error. File-Export-Sharepoint Template: barfs with a A World Wide Web browser, such as Windows Internet Explorer, is required to use this feature error. Site-Administration-Backup Web Site: wants to create the backup .cmp file on the sharepoint server itself. I don't have access to any servers on the same network so I can't redirect it to any form of the suggested \\server\place. Barfs with a The Web application at $URL could not be found. [...] error. Possibly moot because Google tells me that bad things happen using OSD to back up sites larger than 24MB (which this site is most definitely). So I called the helpdesk of the outsource provider, and got told that they recommend using OSD, but no they don't actually provide any application support for OSD (not that I blame them for that), but they could do a stsadm.exe backup and provide us with that, and OSD should be able to read the resulting cmp file. Then for authorization reasons they had my customer call them directly (since I can't authorize such an operation), and they told him that he didn't want a stsadm.exe backup, he wanted to get into an 'explorer view' and deal with things that way (they were vague). Google hasn't been much help in figuring out what an 'explorer view' is, let alone how I bring one up. The end goal of this operation is to have a backup of the site as it exists (hopefully today, but shortly anyways) in such a format that we don't need another sharepoint server to restore it to. Ie we'd like to be able to pick individual content directly out of this backup. We are not excessively concerned with things like formatting. We just want the documents. This is a fairly complex site with multiple subsites and multiple folders per subsite, so sitting there and manually downloading each file isn't really going to happen if there is a better easier way. So, my questions: Is the stsadm.exe backup what I want? If not, what do I want? If I manage to convince them that I do want the stsadm.exe backup, can I pick files out of the resulting backup file with OSD? If OSD isn't going to let me extract individual files, is there a tool I can use that can?

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  • How Hacker Can Access VPS CentOS 6 content?

    - by user2118559
    Just want to understand. Please, correct mistakes and write advices Hacker can access to VPS: 1. Through (using) console terminal, for example, using PuTTY. To access, hacker need to know port number, username and password. Port number hacker can know scanning open ports and try to login. The only way to login as I understand need to know username and password. To block (make more difficult) port scanning, need to use iptables configure /etc/sysconfig/iptables. I followed this https://www.digitalocean.com/community/articles/how-to-setup-a-basic-ip-tables-configuration-on-centos-6 tutorial and got *nat :PREROUTING ACCEPT [87:4524] :POSTROUTING ACCEPT [77:4713] :OUTPUT ACCEPT [77:4713] COMMIT *mangle :PREROUTING ACCEPT [2358:200388] :INPUT ACCEPT [2358:200388] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [2638:477779] :POSTROUTING ACCEPT [2638:477779] COMMIT *filter :INPUT DROP [1:40] :FORWARD ACCEPT [0:0] :OUTPUT ACCEPT [339:56132] -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG NONE -j DROP -A INPUT -p tcp -m tcp ! --tcp-flags FIN,SYN,RST,ACK SYN -m state --state NEW -j DROP -A INPUT -p tcp -m tcp --tcp-flags FIN,SYN,RST,PSH,ACK,URG FIN,SYN,RST,PSH,ACK,URG -j DROP -A INPUT -i lo -j ACCEPT -A INPUT -p tcp -m tcp --dport 80 -j ACCEPT -A INPUT -p tcp -m tcp --dport 110 -j ACCEPT -A INPUT -p tcp -m tcp --dport 22 -j ACCEPT -A INPUT -s 11.111.11.111/32 -p tcp -m tcp --dport 22 -j ACCEPT -A INPUT -p tcp -m tcp --dport 21 -j ACCEPT -A INPUT -s 11.111.11.111/32 -p tcp -m tcp --dport 21 -j ACCEPT COMMIT Regarding ports that need to be opened. If does not use ssl, then seems must leave open port 80 for website. Then for ssh (default 22) and for ftp (default 21). And set ip address, from which can connect. So if hacker uses other ip address, he can not access even knowing username and password? Regarding emails not sure. If I send email, using Gmail (Send mail as: (Use Gmail to send from your other email addresses)), then port 25 not necessary. For incoming emails at dynadot.com I use Email Forwarding. Does it mean that emails “does not arrive to VPS” (before arriving to VPS, emails are forwarded, for example to Gmail)? If emails does not arrive to VPS, then seems port 110 also not necessary. If use only ssl, must open port 443 and close port 80. Do not understand regarding port 3306 In PuTTY with /bin/netstat -lnp see Proto Recv-Q Send-Q Local Address Foreign Address State PID/Program name tcp 0 0 0.0.0.0:3306 0.0.0.0:* LISTEN 992/mysqld As understand it is for mysql. But does not remember that I have opened such port (may be when installed mysql, the port is opened automatically?). Mysql is installed on the same server, where all other content. Need to understand regarding port 3306 2. Also hacker may be able access console terminal through VPS hosting provider Control Panel (serial console emergency access). As understand only using console terminal (PuTTY, etc.) can make “global” changes (changes that can not modify with ftp). 3. Hacker can access to my VPS exploiting some hole in my php code and uploading, for example, Trojan. Unfortunately, faced situation that VPS was hacked. As understand it was because I used ZPanel. On VPS ( \etc\zpanel\panel\bin) ) found one php file, that was identified as Trojan by some virus scanners (at virustotal.com). Experimented with the file on local computer (wamp). And appears that hacker can see all content of VPS, rename, delete, upload etc. From my opinion, if in PuTTY use command like chattr +i /etc/php.ini then hacker could not be able to modify php.ini. Is there any other way to get into VPS?

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  • Server Cabinet/Room Cooling

    - by user37226
    Hello all. I currently have two desktops and three servers in my office sitting on the floor (I know this is bad). With that many servers the ambient temperature in the room goes up quickly. I am located in Dallas, TX so during the winter, if the heat is kept low, it is not a problem, but during the summer it easily jumps the room +10 degrees. I have decided and found a free 42U server cabinet that a hosting company was throwing away to house all of these systems in. One server is in a rack mount case while the other four servers are housed in mid-tower cases. I have purchased shelves for each computer and plan to lay the towers side ways on these shelves (as replacing the cases costs a heck of a lot of money). I like the idea of housing all of these systems in the cabinet because it will save a lot of room and clean up all of the cabling currently laying all over the office floor. When putting this setup together over the next couple of weeks, I want to address issues with dust and cooling. The server cabinet has a fan on top, front plexiglass door and a rear metal door with vent wholes on the bottom. First the cooling issues. I know I am going to want to have cool air enter the bottom of the cabinet and exit the top. I do not want the room heating up though as this will make my work area hot and then make the servers warmer as the air eventually reenters the cabinet. I had an idea to fix this problem, but am unsure if it will work. I was thinking of taking flexible piping and adapting it to the back fans of the computer having the other end of the pipe at the top close to the cabinet's top mounted fan. I was then thinking of creating a duct around the top fan into the attic. Now I am very concerned that the attic will cause issues with this type of setup because during July/August time frame, the attic is easily 120 degrees F. I could also use the flexible pipe to take it to an attic exhaust vent if it would be better to vent it into the 100 degree air outside (at least there may be wind. The other option would be to buy a small portable air conditioner. This may be a possibility, but do I want to spend the extra money on power? I bet this increases the noise. Plus they are around $250 on Amazon. What would you all recommend? Depending on the solution I end up running with above, I would also like to limit the dust that gets into the cabinet. If I were to cut a whole and mount a second cabinet fan on the bottom of the rear door, could I possibly mount a standard home air filter on the other side of that whole? Thanks in advance for your recommendations. I look forward to reading your interesting ideas.

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  • Server Cabinet/Room Cooling

    - by user37226
    Hello all. I currently have two desktops and three servers in my office sitting on the floor (I know this is bad). With that many servers the ambient temperature in the room goes up quickly. I am located in Dallas, TX so during the winter, if the heat is kept low, it is not a problem, but during the summer it easily jumps the room +10 degrees. I have decided and found a free 42U server cabinet that a hosting company was throwing away to house all of these systems in. One server is in a rack mount case while the other four servers are housed in mid-tower cases. I have purchased shelves for each computer and plan to lay the towers side ways on these shelves (as replacing the cases costs a heck of a lot of money). I like the idea of housing all of these systems in the cabinet because it will save a lot of room and clean up all of the cabling currently laying all over the office floor. When putting this setup together over the next couple of weeks, I want to address issues with dust and cooling. The server cabinet has a fan on top, front plexiglass door and a rear metal door with vent wholes on the bottom. First the cooling issues. I know I am going to want to have cool air enter the bottom of the cabinet and exit the top. I do not want the room heating up though as this will make my work area hot and then make the servers warmer as the air eventually reenters the cabinet. I had an idea to fix this problem, but am unsure if it will work. I was thinking of taking flexible piping and adapting it to the back fans of the computer having the other end of the pipe at the top close to the cabinet's top mounted fan. I was then thinking of creating a duct around the top fan into the attic. Now I am very concerned that the attic will cause issues with this type of setup because during July/August time frame, the attic is easily 120 degrees F. I could also use the flexible pipe to take it to an attic exhaust vent if it would be better to vent it into the 100 degree air outside (at least there may be wind. The other option would be to buy a small portable air conditioner. This may be a possibility, but do I want to spend the extra money on power? I bet this increases the noise. Plus they are around $250 on Amazon. What would you all recommend? Depending on the solution I end up running with above, I would also like to limit the dust that gets into the cabinet. If I were to cut a whole and mount a second cabinet fan on the bottom of the rear door, could I possibly mount a standard home air filter on the other side of that whole? Thanks in advance for your recommendations. I look forward to reading your interesting ideas.

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  • nginx server over https using up all available file handles (upd: infinite loop?)

    - by mmr
    Hi all, So I have an nginx server that's working over https with Sinatra. When I try to download a jnlp file in a configuration that works fine over Mongrel and http (no s), the nginx server fails to serve the file with a 504 error. Subsequent checking of the logs states that this error is due to overflowing the available number of file handles, ie, "24: too many open files". Running sudo lsof -p <nginx worker pid> gets me a huge list of files, all looking like: nginx 1771 nobody 11u IPv4 10867997 0t0 TCP localhost:44704->localhost:https (ESTABLISHED) nginx 1771 nobody 12u IPv4 10868113 0t0 TCP localhost:https->localhost:44704 (ESTABLISHED) nginx 1771 nobody 13u IPv4 10868114 0t0 TCP localhost:44705->localhost:https (ESTABLISHED) nginx 1771 nobody 14u IPv4 10868191 0t0 TCP localhost:https->localhost:44705 (ESTABLISHED) nginx 1771 nobody 15u IPv4 10868192 0t0 TCP localhost:44706->localhost:https (ESTABLISHED) nginx 1771 nobody 16u IPv4 10868255 0t0 TCP localhost:https->localhost:44706 (ESTABLISHED) nginx 1771 nobody 17u IPv4 10868256 0t0 TCP localhost:44707->localhost:https (ESTABLISHED) nginx 1771 nobody 18u IPv4 10868330 0t0 TCP localhost:https->localhost:44707 (ESTABLISHED) nginx 1771 nobody 19u IPv4 10868331 0t0 TCP localhost:44708->localhost:https (ESTABLISHED) nginx 1771 nobody 20u IPv4 10868434 0t0 TCP localhost:https->localhost:44708 (ESTABLISHED) Increasing the number of files that can be opened is no help, because then nginx just blows right past that limit. And no wonder, it looks like it's in some kind of loop to pull all available files. Any idea what's going on, and how to fix it? EDIT: nginx 0.7.63, ubuntu linux, sinatra 1.0 EDIT 2: Here's the offending code. It's sinatra serving jnlp, which I finally figured out: get '/uploader' do #read in the launch.jnlp file theJNLP = "" File.open("/launch.jnlp", "r+") do |file| while theTemp = file.gets theJNLP = theJNLP + theTemp end end content_type :jnlp theJNLP end If I serve this with Sinatra via Mongrel and http, everything works fine. If I serve this with Sinatra and nginx via https, I get the above error. All other parts of the website appear to be equivalent. EDIT: I have since upgraded to passenger 2.2.14, ruby 1.9.1, nginx 0.8.40, openssl 1.0.0a, and no change. EDIT: The culprit appears to be infinite redirects due to using SSL. I don't know how to fix this, other than hosting the jnlp file in the root directory of the server (which I'd rather not do, since it limits me to one jnlp-based app at a time). The relevant lines from nginx.conf: # HTTPS server # server { listen 443; server_name MyServer.org root /My/Root/Dir; passenger_enabled on; expires 1d; proxy_set_header X-FORWARDED_PROTO https; proxy_set_header X_FORWARDED_PROTO https;#the almighty google is not clear on which to use location /upload { proxy_pass https://127.0.0.1:443; } } The funny thing about this is, first, I was putting the jnlp into a directory called 'uploader', not 'upload', but that still appeared to trigger the problem, since that proxy_pass directive appeared in the logs. Second, again, moving the jnlp into root avoided the problem, because there wasn't any of this proxying due to ssl. So, how can I avoid the infinite proxy_pass loop in nginx?

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  • Thoughts on home NAS server

    - by user826955
    I currently have a NAS with a 2x2TB HDD 1x16GB SSD layout on a mini-itx atom board. The NAS is in a Lian Li PC-Q07 case. On this system I was running freebsd 8 with a gmirror raid 1 setup, which was enough for my needs. So far I was using the NAS for: Fileserver with AFP protocol (only mac clients used) SVN server hosting all my source trees of my projects JIRA (performance was okay-ish) Timemachine backup for the macs The power consumption was about 38W, although I did not put HDDs asleep when unused (I think this is not possible in a raid setup). I liked the NAS because: the performance was good through gigabit LAN (enough for my needs) power consumption was good its a pretty small case and fits in one of my cupboards I disliked the NAS a bit because: it was a bit noisy, the Q07 case vibrated a good amount because of the HDDs. I switched the NAS off every evening I do not have a real backup of the data on the NAS, only the internal raid 1 as safety. I really dont want to loose my source trees under no circumstances, so I would really be sleeping better if I knew I had regular backups somewhere. Recently, the board seemed to have died, I can't boot anymore. Thus, I was thinking about a redesign of my NAS (I still have to find out what parts are broken, I probably need to replace the mainboard and SSD. HDDs seem to be okay). First of all, I was wondering what other users have as backup for their NAS? Are you actually using a second NAS, and regularly copying over the data to have it safe? Or is there any better solution to this? I was thinking about getting a cheap NAS like the synology DS112j with only one disk, and use rsync or something similar to regularly copy data over to the second NAS (wake the second NAS upon start, shut it down after copy). Although this approach seems somewhat weird, It would have the benefit (?) that I could use a single disk instead of raid in the main NAS, and put the disk asleep when idle, and have the NAS running 24/7 with low energy consumption (I found no way to do this with a gmirror setup). Is there any recommended backup solution for a small NAS? Then I was thinking about a different raid setup. Since I have to buy a new mainboard as well as SSD, I might as well switch over to a i3 board with more ram, and also switch to ZFS. I am not familar with ZFS, I've never used it, but I read and hear much about it. Would it be viable to set up a ZFS storage with only 2 disks? Can I easily extend this storage with more disks, once I choose to add some? I could maybe get a new case like the Fractal Design Array R2 which has more 3,5" slots. I could as well get another 2 disks, but I would prefer sticking with the existing 2 for enegery/heat/noise reasons. Should I go for a ZFS storage or stick to my gmirror setup? I would also like to keep freebsd as operating system, and also I dont need any web gui or something (that is, I dont need/want to use FreeNAS or Openfiler etc). Does anyone maybe have a sample setup in use so I can compare energy consumption/noise/software setup? Any guidance towards the NAS of my dreams (silent, low energy, safe w/ backups) much appreciated.

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  • Wear and tear on server hard drive from filesystem polling by PHP script

    - by jackie
    So I'm working on a discussion platform, and various clients will visit http://host/thread.php, which will render the discussion thread to date in addition to a form to submit a new post. When a new post is submitted, I would like all of the other clients with browser windows open to have it appear in near-real-time. One of the constraints of my script is that it may not use a DBMS and it must stay in the filesystem. Additionally, I can't use any PECL/PEAR extensions like inotify or anything like that for IPC. The flow will look like this: Client A requests thread.php and the thread is so far empty, but nonetheless it opens a Server-Side Event at eventPusher.php. Client B does the same. Client A fills out a post in the form and and submits (POSTs) it to subHandler.php. ??? (subHandler stores the new submission into the main thread storefile which gets read from when a fresh, new client requests thread.php, in addition to somehow signalling to the continually-running eventPusher event-source that a new comment was posted and that it should echo the event-json to the client. How, exactly, it will send this signal I'm yet unsure of, but there are a few options that I've thought of -- this is the crux of the question, so see below for more clarification) eventPusher.php happily pushes the new event to the client and it shows up soon after it was originally submitted on all clients who have the page open's screens. Now for the #4 missing-link mystery-step, I see a few problems. I mean, either way, eventPusher is gonna be doing a while loop of some sort -- it's gonna be polling something, I think that much is clear. (If that's a bad assumption please do let me know.) Now, the simplest way would be subHandler gets invoked on the form submission, writes it to the main store in addition to newComments.xml, then exits without doing anything else. Then eventPusher checks in newComments.xml every X seconds (by the way, what would be a reasonable time interval here?) and if it finds something then it emits an event to the client. Now, my fear with this is that the server's hard drive will have to constantly start spinning up. Maybe this isn't the case, perhaps it would just get cached in RAM and the linux kernel would take care of this transparently such that filesystem access doesn't actually engage the device because the kernel knows that that particular file hasn't changed since last read. * idea #2: I have no idea how to go about this, but perhaps there is a variable scope that gets stored in general RAM on the system which can be read by any process. Like if we mega-exported a bash variable so that $new_post is normally false but it gets toggled to true by subHandler, and then back to flase once it's pushed to the client. I doubt there's such a variable scope in PHP directly, but I struggle with the concept of variable scope, I just can't seem to understand it no matter what I read on it. * idea #3: eventPusher queries ps in its whileloop for another instance of itself. If there's not another eventPusher active then it's highly unlikely that new comments will be getting submitted. It's okay if this only works =90% of the time, it doesn't need to be completely foolproof. * idea #4: eventPusher queries DMESG to see if that file's been written to recently. So to sum everything up, I need to have inter-php-script-communication in near-real-time that will work on a standard mod_php shared hosting setup without any elevated privileges, PHP addon modules, or other system adjustments that can't be done from the PHP script itself at runtime. With*out* spinning up the drive more than a few times. No SQL servers either. Apologies if my english isn't the best, I'm still trying to improve on it.

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  • Duplicate GET request from multiple IPs - can anyone explain this?

    - by dwq
    We've seen a pattern in our webserver access logs which we're having problem explaining. A GET request appears in the access log which is a legitimate, but private, url as part of normal e-commerce website use (by private, we mean there is a unique key in a url form variable generated specifically for that customer session). Then a few seconds later we get hit with an identical request maybe 10-15 times within the space of a second. The duplicate requests are all from different IP addresses. The UserAgent for the duplicates are all the same (but different from the original request). The reverse DNS lookup on the IPs for all the duplicates requests resolve to the same large hosting company. Can anyone think of a scenario what would explain this? EDIT 1 Here's an example that's probably anonymised beyond being any actual use, but it might give an idea of the sort of pattern we're seeing (it's from a search query as they sometimes get duplicated too): xx.xx.xx.xx - - [21/Jun/2013:21:42:57 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "http://www.ourdomain.com/index.html" "Mozilla/5.0 (compatible; MSIE 10.0; Windows NT 6.1; WOW64; Trident/6.0)" xx.xx.xx.xx - - [21/Jun/2013:21:43:03 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" xx.xx.xx.xx - - [21/Jun/2013:21:43:03 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" xx.xx.xx.xx - - [21/Jun/2013:21:43:04 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" xx.xx.xx.xx - - [21/Jun/2013:21:43:04 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" xx.xx.xx.xx - - [21/Jun/2013:21:43:04 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" xx.xx.xx.xx - - [21/Jun/2013:21:43:04 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" xx.xx.xx.xx - - [21/Jun/2013:21:43:04 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" xx.xx.xx.xx - - [21/Jun/2013:21:43:04 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" xx.xx.xx.xx - - [21/Jun/2013:21:43:04 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" xx.xx.xx.xx - - [21/Jun/2013:21:43:04 +0100] "GET /search.html?search=widget&Submit=Search HTTP/1.0" 200 5475 "" "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_6_7) AppleWebKit/534.30 (KHTML, like Gecko) Chrome/12.0.742.91 Safari/534.30" UPDATE 2 Sometimes it is part of a checkout flow that's duplicated to I'd think twitter is unlikely.

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  • Postfix not sending/allowing receiving of messages after server (hardware) changed

    - by 537mfb
    We had na old notebook runing Ubuntu 12.04 working as a web/ftp/mail server and it worked but since the notebook was a notebook and pretty old and unreliable, a desktop was bought to replace it before it stopped working all together. Due to issues with the new desktop's vídeo card, we couldn't use Ubuntu 12.04 so we installed Ubuntu 13.10 and wen't about configuring it. Since we removed the notebook from the network, we kept the same Computer Name and local IP address to make things as close to the old server as possible configuration-wise. However, something has gone wrong since Postfix is throwing error 451 4.3.0 lookup faillure on every attempt to send a mail, and no email can be received either. Our main.cf file is a copy of the one we were using (and working) on the old server (notice we use EHCP) # See /usr/share/postfix/main.cf.dist for a commented, more complete version # Debian specific: Specifying a file name will cause the first # line of that file to be used as the name. The Debian default # is /etc/mailname. #myorigin = /etc/mailname smtpd_banner = $myhostname ESMTP $mail_name powered by Easy Hosting Control Panel (ehcp) on Ubuntu, www.ehcp.net biff = no # appending .domain is the MUA's job. append_dot_mydomain = no # Uncomment the next line to generate "delayed mail" warnings #delay_warning_time = 4h readme_directory = no myhostname = m21-traducoes.com.pt relayhost = mydestination = localhost, 89.152.248.139 mynetworks = 127.0.0.0/8, 192.168.0.0/16, 172.16.0.0/16, 10.0.0.0/8, 89.152.248.0/24 virtual_alias_domains = virtual_alias_maps = proxy:mysql:/etc/postfix/mysql-virtual_forwardings.cf, proxy:mysql:/etc/postfix/mysql-virtual_email2email.cf transport_maps = proxy:mysql:/etc/postfix/mysql-virtual_transports.cf virtual_mailbox_domains = proxy:mysql:/etc/postfix/mysql-virtual_domains.cf virtual_mailbox_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailboxes.cf virtual_mailbox_base = /home/vmail virtual_uid_maps = static:5000 virtual_gid_maps = static:5000 smtpd_sasl_auth_enable = yes smtpd_sasl_security_options = noanonymous broken_sasl_auth_clients = yes smtpd_recipient_restrictions = permit_mynetworks,permit_sasl_authenticated,check_client_access hash:/var/lib/pop-before-smtp/hosts,reject_unauth_destination smtp_use_tls = yes smtpd_use_tls = yes smtpd_tls_auth_only = no smtpd_tls_CAfile = /etc/postfix/cacert.pem smtpd_tls_cert_file = /etc/postfix/smtpd.cert smtpd_tls_key_file = /etc/postfix/smtpd.key smtpd_tls_loglevel = 1 smtpd_tls_received_header = yes smtpd_tls_session_cache_timeout = 3600s tls_random_source = dev:/dev/urandom virtual_create_maildirsize = yes virtual_mailbox_extended = yes virtual_mailbox_limit_maps = proxy:mysql:/etc/postfix/mysql-virtual_mailbox_limit_maps.cf virtual_mailbox_limit_override = yes virtual_maildir_limit_message = "The user you are trying to reach is over quota." virtual_overquota_bounce = yes debug_peer_list = sender_canonical_maps = debug_peer_level = 1 proxy_read_maps = $local_recipient_maps $mydestination $virtual_alias_maps $virtual_alias_domains $virtual_mailbox_maps $virtual_mailbox_domains $relay_recipient_maps $canonical_maps $sender_canonical_maps $recipient_canonical_maps $relocated_maps $mynetworks $virtual_mailbox_limit_maps $transport_maps alias_maps = hash:/etc/aliases smtpd_relay_restrictions = permit_mynetworks, permit_sasl_authenticated,check_client_access hash:/var/lib/pop-before-smtp/hosts,reject_unauth_destination smtpd_destination_concurrency_limit = 2 smtpd_destination_rate_delay = 1s smtpd_extra_recipient_limit = 10 disable_vrfy_command = yes smtpd_delay_reject = yes smtpd_helo_required = yes smtpd_error_sleep_time = 1s smtpd_soft_error_limit = 10 smtpd_hard_error_limit = 20 This configuration was working before but now everytime i try to send a mail in squirrelmail it reports: Message not sent. Server replied: Requested action aborted: error in processing 451 4.3.0 <[email protected]>: Temporary lookup failure And i can't send mail to it from outsider either. Any ideas? EDIT: Here are some issues MXToolBox reports to my domain, answering hopefully to @Teun Vink: BlackList Mail Server Web Server DNS Error 4 0 2 0 Warnings 0 0 0 3 Passed 0 6 3 12 So the domain is on some blacklist, but that doesn't explain the error at all No mail server issues found (except it's not working) Those two web server errors it's because i don't have HTTPS workin (No SSL Certificate) so the test fails Those 3 DNS warnings we're already there when it was working with the other machine and are related to stuff i can't control: SOA Refresh Value is outside of the recommended range SOA Expire Value out of recommended range SOA NXDOMAIN Value too high I've searched and as far as i can tell only the guys who sold the retail can change those values and they won't. Edit2: I half solved the issue.on the new machine postfix was installed but postfix-mysql waasn't so he couldn't connect to the database (rookie mistake). After fixing that, i can now send mails to the outsider without any issues, however i am still not able to receive mails from utside. The sender doesn't get any message warning about the non-delivery but the message doesn't fall in the inbox and the log shows: Nov 13 15:11:57 m21-traducoes postfix/smtpd[5872]: NOQUEUE: reject: RCPT from re lay4.ptmail.sapo.pt[212.55.154.24]: 451 4.3.5 <relay4.ptmail.sapo.pt[212.55.154. 24]>: Client host rejected: Server configuration error; from=<[email protected]> to=<[email protected]> proto=SMTP helo=<sapo.pt> Nov 13 15:11:57 m21-traducoes postfix/smtpd[5872]: disconnect from relay4.ptmail .sapo.pt[212.55.154.24]

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  • Where's my memory?! Nginx + PHP-FPM front end webserver slows to a crawl...

    - by incredimike
    I'm not sure if I have a problem with a memory leak (as my hosting company suggests), or if we both need to read http://linuxatemyram.com. Maybe you clever people can help us out? This is a front-end webserver VM running essentially only nginx & php-fpm on RHEL 5.5. This server is powering Magento, a PHP eCommerce thinggy. The server is running in a shared environment, but we're changing that soon. Anyway.. after a reboot the server runs just fine, but within a day it will grind itself into nothingness. Pages will take literally 2 minutes to load, CPU spikes like crazy, etc.. The console is even sluggish when I SSH in. It's like my whole server is being brought to its knees. I've also been monitoring the DB server via top and tcpdumping incoming traffic. The DB stays idle for a good portion of that "slow" load time. When i start seeing queries coming from the front-end server, the page loads soon afterward. Here are some stats after me logging in during a slow-down, after restarting php-fpm: [mike@front01 ~]$ free -m total used free shared buffers cached Mem: 5963 5217 745 0 192 314 -/+ buffers/cache: 4711 1252 Swap: 4047 4 4042 [mike@front01 ~]$ top top - 11:38:55 up 2 days, 1:01, 3 users, load average: 0.06, 0.17, 0.21 Tasks: 131 total, 1 running, 130 sleeping, 0 stopped, 0 zombie Cpu0 : 0.0%us, 0.3%sy, 0.0%ni, 99.3%id, 0.3%wa, 0.0%hi, 0.0%si, 0.0%st Cpu1 : 0.3%us, 0.0%sy, 0.0%ni, 99.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu2 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Cpu3 : 0.0%us, 0.0%sy, 0.0%ni,100.0%id, 0.0%wa, 0.0%hi, 0.0%si, 0.0%st Mem: 6106800k total, 5361288k used, 745512k free, 199960k buffers Swap: 4144728k total, 4976k used, 4139752k free, 328480k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 31806 apache 15 0 601m 120m 37m S 0.0 2.0 0:22.23 php-fpm 31805 apache 15 0 549m 66m 31m S 0.0 1.1 0:14.54 php-fpm 31809 apache 16 0 547m 65m 32m S 0.0 1.1 0:12.84 php-fpm 32285 apache 15 0 546m 63m 33m S 0.0 1.1 0:09.22 php-fpm 32373 apache 15 0 546m 62m 32m S 0.0 1.1 0:09.66 php-fpm 31808 apache 16 0 543m 60m 35m S 0.0 1.0 0:18.93 php-fpm 31807 apache 16 0 533m 49m 30m S 0.0 0.8 0:08.93 php-fpm 32092 apache 15 0 535m 48m 27m S 0.0 0.8 0:06.67 php-fpm 4392 root 18 0 194m 10m 7184 S 0.0 0.2 0:06.96 cvd 4064 root 15 0 154m 8304 4220 S 0.0 0.1 3:55.57 snmpd 4394 root 15 0 119m 5660 2944 S 0.0 0.1 0:02.84 EvMgrC 31804 root 15 0 519m 5180 932 S 0.0 0.1 0:00.46 php-fpm 4138 ntp 15 0 23396 5032 3904 S 0.0 0.1 0:02.38 ntpd 643 nginx 15 0 95276 4408 1524 S 0.0 0.1 0:01.15 nginx 5131 root 16 0 90128 3340 2600 S 0.0 0.1 0:01.41 sshd 28467 root 15 0 90128 3340 2600 S 0.0 0.1 0:00.35 sshd 32602 root 16 0 90128 3332 2600 S 0.0 0.1 0:00.36 sshd 1614 root 16 0 90128 3308 2588 S 0.0 0.1 0:00.02 sshd 2817 root 5 -10 7216 3140 1724 S 0.0 0.1 0:03.80 iscsid 4161 root 15 0 66948 2340 800 S 0.0 0.0 0:10.35 sendmail 1617 nicole 17 0 53876 2000 1516 S 0.0 0.0 0:00.02 sftp-server ... Is there anything else I should be looking at, or any more information that might be useful? I'm just a developer, but the slowdowns on this system worry me and make it hard to do my work.. Help me out, ServerFault!

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  • Trying to connect phpMyAdmin to remote mySQL server ( 2002: can't connect )

    - by Malcolm Jones
    Trying to get phpMyAdmin to talk to a remote mySQL server. The config is below and there is already a user set up in mySQL DB to be able to log in from the specified host that PMA sits on. Hosting is provided by Rackspace (Rightscale) and both cloud servers behind the same firewall. [config.inc.php] <?php $cfg['blowfish_secret'] = ''; $i = 0; $i++; $cfg['Servers'][$i]['host'] = 'XX.XX.XX.XX'; // MySQL hostname or IP address $cfg['Servers'][$i]['port'] = ''; // MySQL port - leave blank for default port $cfg['Servers'][$i]['socket'] = ''; // Path to the socket - leave blank for default socket $cfg['Servers'][$i]['connect_type'] = 'tcp'; // How to connect to MySQL server ('tcp' or 'socket') $cfg['Servers'][$i]['extension'] = 'mysql'; // The php MySQL extension to use ('mysql' or 'mysqli') $cfg['Servers'][$i]['compress'] = FALSE; // Use compressed protocol for the MySQL connection // (requires PHP >= 4.3.0) $cfg['Servers'][$i]['controluser'] = ''; // MySQL control user settings // (this user must have read-only $cfg['Servers'][$i]['controlpass'] = ''; // access to the "mysql/user" // and "mysql/db" tables). // The controluser is also // used for all relational // features (pmadb) $cfg['Servers'][$i]['auth_type'] = 'config'; // Authentication method (config, http or cookie based)? $cfg['Servers'][$i]['user'] = 'USERNAME'; // MySQL user $cfg['Servers'][$i]['password'] = 'PASSWORD'; // MySQL password (only needed // with 'config' auth_type) $cfg['Servers'][$i]['only_db'] = ''; // If set to a db-name, only // this db is displayed in left frame // It may also be an array of db-names, where sorting order is relevant. $cfg['Servers'][$i]['hide_db'] = ''; // Database name to be hidden from listings $cfg['Servers'][$i]['verbose'] = ''; // Verbose name for this host - leave blank to show the hostname $cfg['Servers'][$i]['pmadb'] = ''; // Database used for Relation, Bookmark and PDF Features // (see scripts/create_tables.sql) // - leave blank for no support // DEFAULT: 'phpmyadmin' $cfg['Servers'][$i]['bookmarktable'] = ''; // Bookmark table // - leave blank for no bookmark support // DEFAULT: 'pma_bookmark' $cfg['Servers'][$i]['relation'] = ''; // table to describe the relation between links (see doc) // - leave blank for no relation-links support // DEFAULT: 'pma_relation' $cfg['Servers'][$i]['table_info'] = ''; // table to describe the display fields // - leave blank for no display fields support // DEFAULT: 'pma_table_info' $cfg['Servers'][$i]['table_coords'] = ''; // table to describe the tables position for the PDF schema // - leave blank for no PDF schema support // DEFAULT: 'pma_table_coords' $cfg['Servers'][$i]['pdf_pages'] = ''; // table to describe pages of relationpdf // - leave blank if you don't want to use this // DEFAULT: 'pma_pdf_pages' $cfg['Servers'][$i]['column_info'] = ''; // table to store column information // - leave blank for no column comments/mime types // DEFAULT: 'pma_column_info' $cfg['Servers'][$i]['history'] = ''; // table to store SQL history // - leave blank for no SQL query history // DEFAULT: 'pma_history' $cfg['Servers'][$i]['verbose_check'] = TRUE; // set to FALSE if you know that your pma_* tables // are up to date. This prevents compatibility // checks and thereby increases performance. $cfg['Servers'][$i]['AllowRoot'] = TRUE; // whether to allow root login $cfg['Servers'][$i]['AllowDeny']['order'] // Host authentication order, leave blank to not use = ''; $cfg['Servers'][$i]['AllowDeny']['rules'] // Host authentication rules, leave blank for defaults = array(); Please let me know if you need anymore info. -- Malcolm

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  • Email from my new vps is marked as spam

    - by Chriswede
    I got a new vps from x10vps (x10hosting) and set up the domain via cloudflare. This is what the email looks like: Delivered-To: [email protected] Received: by 10.64.19.240 with SMTP id i16csp357708iee; Tue, 9 Oct 2012 01:29:48 -0700 (PDT) Received: by 10.50.57.130 with SMTP id i2mr908846igq.56.1349771387599; Tue, 09 Oct 2012 01:29:47 -0700 (PDT) Return-Path: <[email protected]> Received: from power.SOURCEAPE.COM ([198.91.90.116]) by mx.google.com with ESMTPS id v8si25630942ica.46.2012.10.09.01.29.46 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 09 Oct 2012 01:29:47 -0700 (PDT) Received-SPF: temperror (google.com: error in processing during lookup of [email protected]: DNS timeout) client-ip=198.91.90.116; Authentication-Results: mx.google.com; spf=temperror (google.com: error in processing during lookup of [email protected]: DNS timeout) [email protected] Received: from nk11p03mm-asmtp010.mac.com ([17.158.232.169]:54276) by power.SOURCEAPE.COM with esmtp (Exim 4.80) (envelope-from <[email protected]>) id 1TLVBD-0004Ig-1Y for [email protected]; Tue, 09 Oct 2012 12:28:43 +0400 I then tried to enable SPF and DKIM and got following massage In order to ensure that SPF or DKIM takes effect, you must confirm that this server is an authoritative nameserver for chvw.de. If you need help, contact your hosting provider. Status: Enabled Warning: cPanel is unable to verify that this server is an authoritative nameserver for chvw.de. [?] and the email header now looks like this: Delivered-To: [email protected] Received: by 10.50.183.227 with SMTP id ep3csp14506igc; Tue, 9 Oct 2012 01:55:23 -0700 (PDT) Received: by 10.50.40.133 with SMTP id x5mr992934igk.32.1349772923717; Tue, 09 Oct 2012 01:55:23 -0700 (PDT) Return-Path: <[email protected]> Received: from power.SOURCEAPE.COM ([198.91.90.116]) by mx.google.com with ESMTPS id ng8si25688859icb.42.2012.10.09.01.55.23 (version=TLSv1/SSLv3 cipher=OTHER); Tue, 09 Oct 2012 01:55:23 -0700 (PDT) Received-SPF: temperror (google.com: error in processing during lookup of [email protected]: DNS timeout) client-ip=198.91.90.116; Authentication-Results: mx.google.com; spf=temperror (google.com: error in processing during lookup of [email protected]: DNS timeout) [email protected]; dkim=neutral (bad format) [email protected] DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=chvw.de; s=default; h=Message-ID:Subject:To:From:Date:Content-Transfer-Encoding:Content-Type:MIME-Version; bh=iugsx3Lx0KnqjR7dj3wyQHnJ9pe/z3ntYEVk80k8rx4=; b=IrYsCtHdoPubXVOvLqxd7sLE/TyQTS5P3OrEg5SSUSKnQQcQ/fWWyBrmsrgkFSsw6jCmmRWMDR09vH5bQRpFPMA57B7pf8QRKhwXOWFBV+GnVUqICsfRjnNPvhx/lNp5; Received: from localhost ([127.0.0.1]:46539 helo=direct.chvw.de) by power.SOURCEAPE.COM with esmtpa (Exim 4.80) (envelope-from <[email protected]>) id 1TLVb0-0004dZ-Kd for [email protected]; Tue, 09 Oct 2012 12:55:22 +0400

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  • Windows 8, NVIDIA graphics recognition fails

    - by Roy Grubb
    I just installed Windows 8 Pro OEM 64-bit (clean install) and it won't properly recognize my graphics adapter. When I installed Win8, it automatically installed the BasicDisplay.sys driver dated 6/21/2006. 6.2.9200.16384 (win8_rtm.120725-1247). Hardware - Mobo:MSi G41M-P33 Combo CPU:Intel CoreDuo 6600 Graphics:NVIDIA GeForce 9400GT *OS* - Windows 8 Pro 64-bit OEM The graphics adapter worked fine in Windows XP. The PC is a generic box, bought locally and its mobo failed recently, so I replaced it with the G41M. Microsoft wouldn't let me re-activate Windows XP with a different mobo, so I installed Win8, which appears to work except as described next. Win8 only partially recognizes the graphics adapter and won't allow NVIDIA latest driver installer to see that it's an NVIDIA card. As a result, OpenGL doesn't work, and this is needed by the software I most use. Other than that the graphics look OK. When I say 'partially recognizes', I mean that via the Control Panel, I can see that the adapter is described as NVIDIA, but the driver remains stuck at Microsoft Basic Display Adapter no matter what I try, including "Update driver..." in adapter properties. Display Screen Resolution Advanced Settings Adapter shows: Adapter Type: Microsoft Basic Display Adapter Chip Type: NVIDIA DAC Type: NVIDIA Corporation Bios Information: G27 Board - p381n17 Don't know what this means ... no mention of 9400GT Total Available Graphics Memory: 256 MB Dedicated Video Memory: 0 MB In fact the adapter has 512MB on-board video memory. System Video Memory: 0 MB Shared System Memory: 256 MB And Control Panel Device Manager Display adapters just shows Microsoft Basic Display Adapter. No other graphics adapter, and no unknown device or yellow question mark. What I have tried so far: 1. Cleared CMOS and reset. Updated BIOS and all mobo drivers as follows: 1st I used Driver Reviver to see if any driver updates were required. It found some but I didn't use that to get the drivers. Then I switched to MSi's own mobo driver utility Live Update 5. This also showed the board needed to update several so I used it to fetch the new drivers. After that it showed that everything was up to date and I checked with Driver Reviver again, which also reported no drivers now needed updating. Rebooted. Went to the NVIDIA site to get the latest graphics adapter driver. Their auto-detect "Option 2: Automatically find drivers for my NVIDIA products" said "The NVIDIA Smart Scan was unable to evaluate your system hardware. Please use Option 1 to manually find drivers for your NVIDIA products." So I downloaded 310.70-desktop-win8-win7-winvista-64bit-international-whql.exe, which lists 9400 GT under supported products, but when I run it, it says: "NVIDIA Installer cannot continue This graphics driver could not find compatible graphics hardware." Connected the display to the on-board Intel graphics (G41 Intel Express), removed the NVIDIA card and rebooted, changed to internal graphics in CMOS. Again it installs the MS Basic Display Adapter, and can't properly run my s/w that needs OpenGL. It runs on other machines with Intel Express graphics (WinXP and 7) Shut down and pulled out the power cord. Held start button to discharge all capacitors. Removed and re-inserted NVIDIA adapter in PCI-E slot and made sure properly seated. Connected the monitor to the card, screwed plug to socket. Reconnected power cord. Started and checked in BIOS that Primary Graphics Adapter was set to PCI-E. Started Windows. Uninstalled MS Basic Display Adapter in Device Manager. Screen blanks briefly, reappears. No Graphics adapter entry was then visible in Device Manager. Restarted PC. MS Basic Display Adapter Visible again in Device Manager. Clicked in Device Manager View Show hidden devices. No other graphics adapter appears, no unknown devices. Rebooted. Tried Scan for Hardware changes. None detected. Tried right-click on MS Basic Display Adapter Properties Driver Update Driver... Search automatically. It replied that it had determined driver was up to date. I checked that there were no graphic driver-related entries in Programs and Features that I could delete (none). Searched for any other drivers with nvidia in their name and deleted them, just keeping the 306.97 installer exe file. Did a Windows Update. Ran GPU-Z which shows (main items): Microsoft Basic Display Adapter GPU G72 BIOS 5.72.22.76.88 Device ID 10DE - 01D5 DDR2 Bus Width 32 Bit Memory size 64MB Driver Version nvlddmkm 6.2.9200.16384 (ForceWare 0.00) / Win8 64 NVIDIA SLI Unknown in the drop-down at the foot, "Microsoft Basic Display Adapter" is the only option If I swap hard disks in that machine to one with a Ubuntu 10.4 installation (originally installed on the same PC), lspci shows "VGA compatible controller as NVIDIA Corporation Device 01d5 (rev a1) (prog-if 00 [VGA controller])" and "kernel driver in use: nvidia" I'm out of ideas for new things to try and would be really grateful of suggestions. Thanks!

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  • What's going on with my server? High load, lots of idle CPU time, low disk utilization

    - by Jonathan
    I run a web site and send a legitimate opt-in, daily email newsletter to subscribers. Both the web hosting and email sending are done by the same machine. I have about 100,000 subscribers who have opted in to my daily email newsletter. My PHP script did a pretty good job sending mail to all of them until fairly recently, but as the list has grown I can't keep up. When I run top, I have very high load--usually at least 6 or 7, sometimes as high as 15--even though I only have two CPUs. However, when I run sar, my CPU is idle an average of about 30% of the time. So, it seems I'm not CPU bound. When I run iostat, it seems as though I'm not disk bound because my %util for each device is very low (no more than 5%). Given that I don't seem to be CPU bound or disk bound, why is top reporting such high load? Additionally, since I don't seem to be CPU bound or disk bound, why is my email sending script not able to keep up? Here's what I see when running top: top - 11:33:28 up 74 days, 18:49, 2 users, load average: 7.65, 8.79, 8.28 Tasks: 168 total, 5 running, 162 sleeping, 0 stopped, 1 zombie Cpu(s): 38.9%us, 58.6%sy, 0.8%ni, 0.0%id, 0.7%wa, 0.2%hi, 0.8%si, 0.0%st Mem: 3083012k total, 2144436k used, 938576k free, 281136k buffers Swap: 2048248k total, 39164k used, 2009084k free, 1470412k cached Here's what I see when running iostat -mx: avg-cpu: %user %nice %system %iowait %steal %idle 34.80 1.20 55.24 0.37 0.00 8.38 Device: rrqm/s wrqm/s r/s w/s rMB/s wMB/s avgrq-sz avgqu-sz await svctm %util sda 0.19 71.70 1.59 29.45 0.02 0.07 5.90 0.55 17.82 1.16 3.59 sda1 0.00 0.00 0.00 0.00 0.00 0.00 7.10 0.00 13.80 13.72 0.00 sda2 0.05 50.45 1.13 24.57 0.01 0.29 24.25 0.35 13.43 1.15 2.97 sda3 0.05 10.17 0.20 2.33 0.01 0.05 43.75 0.05 20.96 2.45 0.62 sda4 0.00 0.00 0.00 0.00 0.00 0.00 2.00 0.00 70.50 70.50 0.00 sda5 0.07 0.22 0.03 0.07 0.00 0.00 32.84 0.08 856.19 8.03 0.08 sda6 0.02 5.45 0.03 0.72 0.00 0.02 67.55 0.02 26.72 5.26 0.39 sda7 0.00 1.56 0.00 0.42 0.00 0.01 38.04 0.00 8.88 5.84 0.24 sda8 0.01 3.84 0.20 1.35 0.00 0.02 28.55 0.05 31.90 4.08 0.63 Here's what I see when running sar: 09:40:02 AM CPU %user %nice %system %iowait %steal %idle 09:50:01 AM all 30.59 1.01 49.80 0.23 0.00 18.37 10:00:08 AM all 31.73 0.92 51.66 0.13 0.00 15.55 10:10:06 AM all 30.43 0.99 48.94 0.26 0.00 19.38 10:20:01 AM all 29.58 1.00 47.76 0.25 0.00 21.42 10:30:01 AM all 29.37 1.02 47.30 0.18 0.00 22.13 10:40:06 AM all 32.50 1.01 52.94 0.16 0.00 13.39 10:50:01 AM all 30.49 1.00 49.59 0.15 0.00 18.77 11:00:01 AM all 29.43 0.99 47.71 0.17 0.00 21.71 11:10:07 AM all 30.26 0.93 49.48 0.83 0.00 18.50 11:20:02 AM all 29.83 0.81 48.51 1.32 0.00 19.52 11:30:06 AM all 31.18 0.88 51.33 1.15 0.00 15.47 Average: all 26.21 1.15 42.62 0.48 0.00 29.54 Here are the top handful of processes listed at the particular time I happened to run top -c: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 8180 mysql 16 0 57448 19m 2948 S 26.6 0.7 4702:26 /usr/sbin/mysqld --basedir=/ --datadir=/var/lib/mysql --user=mysql --pid-file=/var/lib/mysql/bristno.pid --skip-external-locking 26956 brristno 17 0 0 0 0 Z 8.0 0.0 0:00.24 [php] <defunct> 26958 brristno 17 0 94408 43m 37m R 5.0 1.4 0:00.15 /usr/bin/php /home/brristno/public_html/dbv.php 22852 nobody 16 0 9628 2900 1524 S 0.7 0.1 0:00.17 /usr/local/apache/bin/httpd -k start -DSSL 8591 brristno 34 19 96896 13m 6652 S 0.3 0.4 0:29.82 /usr/local/bin/php /home/brristno/bin/mailer.php 1qwqyb6 i0gbor 24469 nobody 16 0 9628 2880 1508 S 0.3 0.1 0:00.08 /usr/local/apache/bin/httpd -k start -DSSL 25495 nobody 15 0 9628 2876 1500 S 0.3 0.1 0:00.06 /usr/local/apache/bin/httpd -k start -DSSL 26149 nobody 15 0 9628 2864 1504 S 0.3 0.1 0:00.04 /usr/local/apache/bin/httpd -k start -DSSL

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  • Using PHP to connect to RADIUS works on one server but not another

    - by JDS
    I have a fleet of webservers that server a LAMP webapp broken into multiple customer apps by virtualhost/domain. The platform is Ubuntu 10.04 VM + PHP 5.3 + Apache 2.2.14, on top of VMware ESX (v4 I think). This stuff's not too important, though -- I'm just setting up the background. I have one customer that connects to a RADIUS server for authentication. We've found that the app responds as if some number of web servers are configured correctly and some are not. i.e. Apparently random authentication failures or successes, with no rhyme or reason. I did a lot of analysis of our fleet, and resolved it down to the differences between two specific web servers. I'll call them "A" and "B". "A" works. "B" does not. "Works" means "connects to and gets authentication data successfully from the RADIUS server". Ultimately, I'm looking for one thing that is different, and I've exhausted everything that I can come up with, so, looking for something else. Here are things I've looked at PHP package versions (all from Ubuntu repos). These are exactly the same across servers. PECL package. There are no PECL packages that aren't installed by apt. Other libraries or packages. Nothing that was network-related or RADIUS-related was different among servers. (There were some minor package differences, though.) Network or hosting environment. I found that some of the working servers were on the same physical environment as some not-working ones (i.e. same ESX containers). So, probably, the physical network layer is not the problem. Test case. I created a test case as follows. It works on the working servers, and fails on the not-working servers, very consistently. <?php $radius = radius_auth_open(); $username = 'theusername'; $password = 'thepassword'; $hostname = '12.34.56.78'; $radius_secret = '39wmmvxghg'; if (! radius_add_server($radius,$hostname,0,$radius_secret,5,3)) { die('Radius Error 1: ' . radius_strerror($radius) . "\n"); } if (! radius_create_request($radius,RADIUS_ACCESS_REQUEST)) { die('Radius Error 2: ' . radius_strerror($radius) . "\n"); } radius_put_attr($radius,RADIUS_USER_NAME,$username); radius_put_attr($radius,RADIUS_USER_PASSWORD,$password); switch (radius_send_request($radius)) { case RADIUS_ACCESS_ACCEPT: echo 'GOOD LOGIN'; break; case RADIUS_ACCESS_REJECT: echo 'BAD LOGIN'; break; case RADIUS_ACCESS_CHALLENGE: echo 'CHALLENGE REQUESTED'; break; default: die('Radius Error 3: ' . radius_strerror($radius) . "\n"); } ?>

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  • a friendly elaboratation on how iceweasel misses as recent request was discovered in post tut

    - by v3x3n
    I would like to specify what you asked about in how iceweasel misses on in hopes that you are interested in considering the answer to be valid considering the package should run efficient to a novice user especially when getting a first impression on a new software, browser, or package they are given by default. First let me say that I am very grateful for all debian has and continues to do for its user base and I am not complaining, only hoping that in mentioning such it will eventually aid in improving the disappointing experience iceweasel gave me in multiple ways right from the start of using it. I am sure tremendous amounts of hard work went into making it work as well as it does, and tremendous effort continues to go into IW like the rest of the package and distros such as this... Having said that, I do aim to keep my examples simple as possible but also explained in enough detail as to not leave out important info to get a full idea of my issue... (Thanks for understanding if I sound novice to debian, I am but continue to learn and advance by trial and error each day, and of course the wonderful help from all the great minds available here and there)... Well, my bone to pick (unfortunately as I disdain being a complainer when so much has been done for us, the end user) with IW is mainly 3 immediately noticed problems in offering me a smooth test drive (completely normal browsing conduct of your average user, I should indicate) as soon as I started out a task using IW (heading directly to google images and searched for a few web sized images, then saved a few (no more than 800 to 900 in dimensions, typically a normal procedure I would imagine) I experienced a horrendous reoccurring freeze and lag time that almost left me to kill the process more than once on each attempt and continued to compound so that by a few attempts later, even 1 single image save locked up the entire browser, ultimately giving up on my procedure in its simplicity with a bit of aggravation, if there was something I had done wrong on my end pre-attempt or during installation. Secondly, visiting video player sites in this case youtube will not allow for any video feed to play whatsoever and again, experienced a slight freezing that eventually dissipated as long as I didn't attempt to press play or reload another video trial... Very annoying and possibly related to my first issue (which could rely on my own lack of knowledge in setup config, but that troubles me if so).... Lastly as another user has stated already, in which brought you to ask them what exactly seemed to be the problem in the first place is also my final straw that broke the weasel's back, leading me here to find a solution to a updated version of firefox... being that iceweasel (an apparent build of firefox 17.x.x) leaving the user to find themselves out of luck when installing their favorite or much useful add-ons or plugins that aid their task or normal usage online.... As the other user clearly stated... there is almost zero options and barely any luck to find compatible plugins with such an outdated version still being used... I can only imagine if as a novoice or standard user to linux... and beginner to debian (which I am all for btw!) if I am discovering major conductivity issues which hinder normal user conduct right off the bat... that there is probably a bundle or more of security vulnerabilities that would unravel to me if I continued to give mr Hommey's package any further attention, or interest in continuing to use... This is a deal breaker on any account, unless all 3 of these issues stated are due to a very n00berish setting or lack thereof (which if that is the case, such was not properly stated for beginner in any place available by following installation tutorials such as LVM installers, which I felt lacked a clear understanding to someone who is trying to learn why and how, rather than, a fix to a potentially broken out of box installation... I really think that is irrelevant in any case however, as there is much step by step support regarding that kind of thing, just saying... its very challenging, along side a job to keep deadlines on, and the need to learn a better and more costomizible system, that was not as popularized when I became a dev via windows (OK OK I know thats a huge mistake and now I am way off original topic but anyway) Thanks very much for taking the time to read over this, and I hope it honestly gives you a few good and valid reasons for users wanting and seeking a way to get around iceweasel altogether... Finally, if I am missing something vital that renders all I've stated invalid or useless, please feel free to shove that elephant in the room my direction! Thanks for all you do, as I am sure it is very useful and dedicated, being you are a debian maintainer, and super user! Much love for intelligence, freedom and sharing the secrets of the web! May it remain unregulated and a good place to grow and learn for generations to come! Stay true! Take care now! -v3x (v3x @ gmx .com)

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  • Is there a bug with Apache 2.2 and content filters (and maybe mod_proxy)?

    - by asciiphil
    I'm running Apache 2.2.15-29 on RHEL 6 (actually Scientific Linux 6.4) and I'm trying to set up a reverse proxy with content rewriting so all of the links on the proxied web pages are rewritten to reference the proxy host. I'm running into a problem with some of the content rewriting and I'd like to know if this is a bug or if I'm doing something wrong (and how to do it right, if applicable). I'm proxying a subdirectory on an internal host (internal.example.com/foo) onto the root of an external host (external.example.com). I need to rewrite HTML, CSS, and Javascript content to fix all of the URLs. I'm also hosting some content locally on the external host, which I don't think is a problem but I'm mentioning here for completeness. My httpd.conf looks roughly like this: <VirtualHost *:80> ServerName external.example.com ServerAlias example.com # Serve all local content directly, reverse-proxy all unknown URIs. RewriteEngine On RewriteRule ^(/(index.html?)?)?$ http://internal.example.com/foo/ [P] RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME} -f [OR] RewriteCond %{DOCUMENT_ROOT}%{REQUEST_FILENAME} -d RewriteRule ^.*$ - [L] RewriteRule ^/~ - [L] RewriteRule ^(.*)$ http://internal.example.com$1 [P] # Standard header rewriting. ProxyPassReverse / http://internal.example.com/foo/ ProxyPassReverseCookieDomain internal.example.com external.example.com ProxyPassReverseCookiePath /foo/ / # Strip any Accept-Encoding: headers from the client so we can process the pages # as plain text. RequestHeader unset Accept-Encoding # Use mod_proxy_html to fix URLs in text/html content. ProxyHTMLEnable On ProxyHTMLURLMap http://internal.example.com/foo/ / ProxyHTMLURLMap http://internal.example.com/foo / ProxyHTMLURLMap /foo/ / ## Use mod_substitute to fix URLs in CSS and Javascript #<Location /> # AddOutputFilterByType SUBSTITUTE text/css # AddOutputFilterByType SUBSTITUTE text/javascript # Substitute "s|http://internal.example.com/foo/|/|nq" #</Location> # Use mod_ext_filter to fix URLs in CSS and Javascript ExtFilterDefine fixurlcss mode=output intype=text/css cmd="/bin/sed -rf /etc/httpd/fixurls" ExtFilterDefine fixurljs mode=output intype=text/javascript cmd="/bin/sed -rf /etc/httpd/fixurls" <Location /> SetOutputFilter fixurlcss;fixurljs </Location> </VirtualHost> The text/html rewriting works just fine. When I use either mod_substitute or mod_ext_filter, the external server sends the pages as Transfer-Encoding: chunked, sends all of the data, and then closes the connection without sending the final, zero-length chunk. Some HTTP clients are unhappy with this. (Chrome won't process any content sent in this way, for example, so the pages don't get CSS applied to them.) Here's a sample wget session: $ wget -O /dev/null -S http://external.example.com/include/jquery.js --2013-11-01 11:36:36-- http://external.example.com/include/jquery.js Resolving external.example.com (external.example.com)... 192.168.0.1 Connecting to external.example.com (external.example.com)|192.168.0.1|:80... connected. HTTP request sent, awaiting response... HTTP/1.1 200 OK Date: Fri, 01 Nov 2013 15:36:36 GMT Server: Apache Last-Modified: Tue, 29 Oct 2013 13:09:10 GMT ETag: "1d60026-187b8-4e9e0ec273e35" Accept-Ranges: bytes Vary: Accept-Encoding X-UA-Compatible: IE=edge,chrome=1 Content-Type: text/javascript;charset=utf-8 Connection: close Transfer-Encoding: chunked Length: unspecified [text/javascript] Saving to: `/dev/null' [ <=> ] 100,280 --.-K/s in 0.005s 2013-11-01 11:36:37 (19.8 MB/s) - Read error at byte 100280 (Success).Retrying. --2013-11-01 11:36:38-- (try: 2) http://external.example.com/include/jquery.js Connecting to external.example.com (external.example.com)|192.168.0.1|:80... connected. HTTP request sent, awaiting response... HTTP/1.1 416 Requested Range Not Satisfiable Date: Fri, 01 Nov 2013 15:36:38 GMT Server: Apache Vary: Accept-Encoding Content-Type: text/html;charset=utf-8 Content-Length: 260 Connection: close The file is already fully retrieved; nothing to do. Am I doing something wrong? Am I hitting some sort of Apache bug? What do I need to do to get it working? (Note that I'd prefer solutions that work within RHEL-6-packaged RPMs and upgrading to Apache 2.4 would be a last resort, as we have a lot of infrastructure built around 2.2 on this system at the moment.)

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  • WPF TabControl - how to preserve control state within tab items (MVVM pattern)

    - by Tim Coulter
    I am a newcomer to WPF, attempting to build a project that follows the recommendations of Josh Smith's excellent article describing The Model-View-ViewModel Design Pattern. Using Josh's sample code as a base, I have created a simple application that contains a number of "workspaces", each represented by a tab in a TabControl. In my application, a workspace is a document editor that allows a hierarchical document to be manipulated via a TreeView control. Although I have succeeded in opening multiple workspaces and viewing their document content in the bound TreeView control, I find that the TreeView "forgets" its state when switching between tabs. For example, if the TreeView in Tab1 is partially expanded, it will be shown as fully collapsed after switching to Tab2 and returning to Tab1. This behaviour appears to apply to all aspects of control state for all controls. After some experimentation, I have realized that I can preserve state within a TabItem by explicitly binding each control state property to a dedicated property on the underlying ViewModel. However, this seems like a lot of additional work, when I simply want all my controls to remember their state when switching between workspaces. I assume I am missing something simple, but I am not sure where to look for the answer. Any guidance would be much appreciated. Thanks, Tim Update: As requested, I will attempt to post some code that demonstrates this problem. However, since the data that underlies the TreeView is complex, I will post a simplified example that exhibits the same symtoms. Here is the XAML from the main window: <TabControl IsSynchronizedWithCurrentItem="True" ItemsSource="{Binding Path=Docs}"> <TabControl.ItemTemplate> <DataTemplate> <ContentPresenter Content="{Binding Path=Name}" /> </DataTemplate> </TabControl.ItemTemplate> <TabControl.ContentTemplate> <DataTemplate> <view:DocumentView /> </DataTemplate> </TabControl.ContentTemplate> </TabControl> The above XAML correctly binds to an ObservableCollection of DocumentViewModel, whereby each member is presented via a DocumentView. For the simplicity of this example, I have removed the TreeView (mentioned above) from the DocumentView and replaced it with a TabControl containing 3 fixed tabs: <TabControl> <TabItem Header="A" /> <TabItem Header="B" /> <TabItem Header="C" /> </TabControl> In this scenario, there is no binding between the DocumentView and the DocumentViewModel. When the code is run, the inner TabControl is unable to remember its selection when the outer TabControl is switched. However, if I explicitly bind the inner TabControl's SelectedIndex property ... <TabControl SelectedIndex="{Binding Path=SelectedDocumentIndex}"> <TabItem Header="A" /> <TabItem Header="B" /> <TabItem Header="C" /> </TabControl> ... to a corresponding dummy property on the DocumentViewModel ... public int SelecteDocumentIndex { get; set; } ... the inner tab is able to remember its selection. I understand that I can effectively solve my problem by applying this technique to every visual property of every control, but I am hoping there is a more elegant solution.

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