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• ICMP Redirect Theory VS. Application

  - by joeqwerty

  I'm trying to watch ICMP redirects in a lab using Cisco Packet Tracer (version 5.3.2) and I'm not seeing them, which leads me to believe that either my lab configuration isn't correct or my understanding of ICMP redirects isn't correct or that Packet Tracer doesn't support/use ICMP redirects. Here's what I believe to be true regarding ICMP redirects: Routers send ICMP redirects when all of these conditions are met: The interface on which the packet comes into the router is the same interface on which the packet gets routed out. The subnet or network of the source IP address is on the same subnet or network of the next-hop IP address of the routed packet. The datagram is not source-routed. The router kernel is configured to send redirects. I have the lab set up in Cisco Packet Tracer as displayed in the image and would expect to see an ICMP redirect from Router1 when pinging from PC1 to PC3. I'm not seeing the ICMP redirect and it looks like Router1 is actually routing all of the packets via Router2. I have IP ICMP debugging enabled on Router1 (and Router2) and I'm not seeing any ICMP redirect activity in either console. I'm also not seeing a route to the PC3 network in the routing table on PC1, which I think confirms that the ICMP redirect is not occurring. I'm using only static routing on Routers 1 and 2. Is my understanding of ICMP redirects incorrect, or is there a problem with my lab configuration or does Packet Tracer not support/use ICMP redirects?

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• SSH Tunnel for Remote Desktop via Intermediary Server Part II

  - by Mihai Todor

  I asked previously how to configure 2 SSH tunnels using an intermediary server in order to run Remote Desktop through them and I managed to make it work. Now, I'm trying to do the same, using the same machines, but in reverse order. Here's the setup: Windows 7 PC in a private network, sitting behind a firewall. Public access Linux server, which has access to the PC. Windows 7 laptop, at home, on which I wish to do Remote Desktop from the PC. I use Putty on the laptop to create a reverse tunnel from it to the Linux server: R60666 localhost:3389. I use Putty on the PC to create a regular tunnel from it to the Linux server: L60666 localhost:60666. I SSH to the Linux sever and I run telnet localhost 60666 and it seems to produce the expected output, as described in the debugging tips that I received here. I try to connect Remote Desktop from the PC to the laptop: localhost:60666. It asks for my username and password, I click OK and it locks my current session on the laptop (so I see the welcome screen on the laptop instead of my desktop), it shows the "Welcome" message in the Remote Desktop screen and then it just goes black. It doesn't disconnect, it doesn't provide any error and I'm not able to perform any actions in the Remote Desktop screen. I tried the same setup with a Windows XP laptop and I'm experiencing the same symptoms. I also tried to use different ports than 60666, but nothing changed. Does anybody have any idea what I'm doing wrong? Update: As pointed out by @jwinders, I'm not able to run telnet PC 3389 from the Linux server directly. Since Windows Firewall has a rule to allow all connections on port 3389, I have no idea what is blocking it. Fortunately, I'm able to create a SSH tunnel from the Linux machine to the PC ssh 3389:localhost:3389 'domain\user'@PC.

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• NFS: Server says "authenticated mount request", but client sees "access denied"

  - by zigdon

  I have two machine, an NFS server (RHEL) and a client (Debian). The server has NFS set up, exporting a particular directory: server:~$ sudo /usr/sbin/rpcinfo -p localhost program vers proto port 100000 2 tcp 111 portmapper 100000 2 udp 111 portmapper 100024 1 udp 910 status 100024 1 tcp 913 status 100021 1 udp 53391 nlockmgr 100021 3 udp 53391 nlockmgr 100021 4 udp 53391 nlockmgr 100021 1 tcp 32774 nlockmgr 100021 3 tcp 32774 nlockmgr 100021 4 tcp 32774 nlockmgr 100007 2 udp 830 ypbind 100007 1 udp 830 ypbind 100007 2 tcp 833 ypbind 100007 1 tcp 833 ypbind 100011 1 udp 999 rquotad 100011 2 udp 999 rquotad 100011 1 tcp 1002 rquotad 100011 2 tcp 1002 rquotad 100003 2 udp 2049 nfs 100003 3 udp 2049 nfs 100003 4 udp 2049 nfs 100003 2 tcp 2049 nfs 100003 3 tcp 2049 nfs 100003 4 tcp 2049 nfs 100005 1 udp 1013 mountd 100005 1 tcp 1016 mountd 100005 2 udp 1013 mountd 100005 2 tcp 1016 mountd 100005 3 udp 1013 mountd 100005 3 tcp 1016 mountd server$ cat /etc/exports /dir *.my.domain.com(ro) client$ grep dir /etc/fstab server.my.domain.com:/dir /dir nfs tcp,soft,bg,noauto,ro 0 0 All seems well, but when I try to mount, I see the following: client$ sudo mount /dir mount.nfs: access denied by server while mounting server.my.domain.com:/dir And on the server I see: server$ tail /var/log/messages Mar 15 13:46:23 server mountd[413]: authenticated mount request from client.my.domain.com:723 for /dir (/dir) What am I missing here? How should I be debugging this?

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• Getting 400 Bad Request when requesting by server name on nginx/uwsgi

  - by Marc Hughes

  I'm trying to run 2 different sites on nginx via different ports (they each have a load balancer that points to the appropriate port). The first site work perfectly. The second site... If I access http://localhost:81/ it works correctly If I access http://127.0.01:81/ it works correctly If I access the hostname http://THEHOSTNAME:81/ it fails with a 400 error If I access the public IP http://x.x.x.x:81/ it fails with a 400 error I've set the error_log to info, but the only lines I get in the log when this happens is: ==> /var/log/nginx/access.log <== 10.183.38.141 - - [24/Aug/2014:21:03:28 +0000] "GET / HTTP/1.1" 400 37 "-" "curl/7.36.0" "-" ==> /var/log/nginx/error.log <== 2014/08/24 21:03:28 [info] 7029#0: *5 client 10.183.38.141 closed keepalive connection In my uwsgi log, I only see this: [pid: 6870|app: 0|req: 87/92] 10.28.23.224 () {32 vars in 380 bytes} [Sun Aug 24 21:05:21 2014] GET / => generated 26 bytes in 1 msecs (HTTP/1.1 400) 2 headers in 82 bytes (1 switches on core 2) What should be my next step in debugging this?

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• Task Scheduler not able to execute .vbs successfully

  - by Django Reinhardt

  Hi there, got this weird problem, which will hopefully have an obvious solution for some enlightened soul: We have several daily tasks we run via a .vbs script on our server (through the Task Scheduler), and for months it has been fine, but recently we've hit a problem. The .vbs script stopped successfully executing... but oddly it worked fine when ran manually! The error given in these circumstances was always "Timeout". We thought we try a little creative thinking, and run the .vbs another way: Via a .bat file. Again we hit weird issues, but with a little more debugging information, this time around. The .bat file is nothing more than... CScript "C:\location\script.vbs" > Log.txt But the Task Scheduler fails with the following error: 0x1: An incorrect function was called or an unknown function was called. The log.txt file says: CScript Error: Initialization of the Windows Script Host failed. (Not enough storage is available to process this command. ) But get this: The .bat file executes perfectly (vbs script and all) if it's executed with a double click! There's only a problem when it's run by Task Scheduler. What the hell? We're running Windows Server 2008 R2 (x64) and yes, the Task Sheduler's results are the same whether the user is logged in or not. Also, the user that can run the scripts successfully manually, is also the same user that runs the scripts in Task Scheduler. Thanks for any help for this weird problem!

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• How do I install OpenStack on a single Ubuntu 12.04 node?

  - by Sam Edwards

  I'm having trouble installing OpenStack in Ubuntu 12.04, for various reasons: The official Ubuntu website recommends Juju and MAAS. However, this is a single node I am trying to get OpenStack installed on, and MAAS requires "two or more nodes" according to the docs. Additionally, I don't have any experience in MAAS and Juju and would rather stick to technologies I am more familiar with so that I can debug problems that arise. I have tried StackGeek but this fails because the node only has a single Ethernet port. The node does, however, have the second hard drive required for the nova storage. I have tried DevStack but cannot log into the dashboard. The login form appears fine, but as soon as I try to submit the page, my browser begins loading indefinitely. I have tried installing straight from packages, but I get an Internal Server Error in the dashboard upon trying to log in, with no helpful logs anywhere in sight to aid me in debugging the issue. Each of these attempts was with a fresh Ubuntu 12.04 LTS setup; I'm finding it really strange that no matter what I try, I cannot get OpenStack installed. Is this even a stable/mature project? Why am I encountering so many bugs?

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• itunes iphone sync stuck on "Waiting for items to copy"

  - by lindes

  superuser crowd, I've found a number of threads about this, but have yet to find a satisfactory answer. Perhaps I'll have better luck on this site?? I hope so... I'm having a problem with iTunes where syncing my iPhone ends up seeming to basically finish, but it says "Waiting for items to copy" after everything else, and just stays there for... well, a very long time, if I let it. Oh, and I'm not sure this is always the case, but at the moment, it's doing this while "Syncing Genius Data to [my iPhone] (Step 8 of 8)". If I click the little x in iTunes, it then gets stuck on "Canceling sync", for an equally indefinite sort of period. If I simply unplug the phone, everything seems to be synced and happy, but the next time I sync, it happens again. I presume this is a bug of some sort on Apple's part, but it seems like people have found workarounds... I'm just having trouble tracking one down that (a) is well described enough that I can actually follow it, (b) has enough detail that I can do it without losing data (i.e. tells me pathnames that I might want to copy first, or the like, before telling me to remove something) (note: see also point (a) -- I can't remove it if it's telling me to remove something that I don't know where it is!), and (c) otherwise seems sane. I'm hoping that here perhaps I'll get better luck -- with either a workaround, and/or debugging tips for figuring out how to find myself a workaround. Note: I'm busy with some other things at the moment, but can try to add some additional information later, if necessary.

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• Starfield Wildcard SSL Certificate Not Trusted in All Browsers

  - by Austen Cameron

  I am at a loss as to what else I might try in order to debug this issue with a Starfield Wildcard SSL Certificate. The problem is that in certain browsers (Safari or the most-updated chrome you can get for OS X 10.5.8 for example) the certificate comes up as untrusted, even on the root domain. My server setup / background info: General LAMP setup - CentOS 6.3 - on a Godaddy VPS Starfield Technologies Wildcard SSL certificate Installed using the instructions from godaddy's support pages ssl.conf lines are basically as follows: SSLCertificateFile /path/to/cert/mysite.com.cert SSLCertificateKeyFile /path/to/cert/mysite.key SSLCertificateChainFile /path/to/cert/sf_bundle.crt Everything seemingly worked fine until the other night when I noticed the problem in OS X, I assume it's more browser version related, but have only been able to replicate it on that particular machine. What I have tried: Updating sf_bundle.crt from godaddy's cert repository and Starfield's repository versions Following This ServerFault answer from Jim Phares - changing the ChainFile line to sf_intermediate.crt from Starfield's repository Using http://www.sslshopper.com/ssl-checker.html on my url It says the domain is correctly listed on the certificate but comes up with an error that reads The certificate is not trusted in all web browsers. You may need to install an Intermediate/chain certificate to link it to a trusted root certificate. What might I try next to remedy the untrusted certificate issue? Let me know if there is any other information needed that might help debugging this issue. Thanks in advance!

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• How \Deleted flag can be unset for all mails in cyrus-imapd mailbox?

  - by Sachin Divekar

  I have a 5GB mailbox which I moved using imapsync. But somehow I messed up with --delete/--delete2 option and end up with almost all the messages having \Deleted flag set. I do not have delayed expunge enabled, so I can not use unexpunge utility. I am using cyrus-imapd v2.3.7. Using cyrus-imapd's debugging feature I found out that email client(Roundcube in my case) fires following IMAP command to unset it. UID STORE 179 -FLAGS.SILENT (\Deleted) I don't know if somehow I can fire this command for all the mails. Is there any way I can unset \Deleted flag for all the mails in the mailbox? UPDATE: Using @geekosaur's tip of specifying range of message-ids in the above command, I could solve it for one mailbox under INBOX like INBOX.folder1. Is there any way I can do it for multiple mailboxes under INBOX recursively? Now I am working on solving it using/creating some script, maybe using Perl's IMAP related module. But still I need to solve it asap so inputs are welcome.

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• Mounting NAS drive with cifs using credentials file through fstab does not work

  - by mahatmanich

  I can mount the drive in the following way, no problem there: mount -t cifs //nas/home /mnt/nas -o username=username,password=pass\!word,uid=1000,gid=100,rw,suid However if I try to mount it via fstab I get the following error: //nas/home /mnt/nas cifs iocharset=utf8,credentials=/home/username/.smbcredentials,uid=1000,gid=100 0 0 auto .smbcredentials file looks like this: username=username password=pass\!word Note the ! in my password ... which I am escaping in both instances I also made sure there are no eol in the file using :set noeol binary from Mount CIFS Credentials File has Special Character chmod on .credentials file is 0600 and chown is root:root file is under ~/ Why am I getting in on the one side and not with fstab?? I am running on ubuntu 12 LTE and mount.cifs -V gives me mount.cifs version: 5.1 Any help and suggestions would be appreciated ... UPDATE: /var/log/syslog shows following [26630.509396] Status code returned 0xc000006d NT_STATUS_LOGON_FAILURE [26630.509407] CIFS VFS: Send error in SessSetup = -13 [26630.509528] CIFS VFS: cifs_mount failed w/return code = -13 UPDATE no 2 Debugging with strace mount through fstab: strace -f -e trace=mount mount -a Process 4984 attached Process 4983 suspended Process 4985 attached Process 4984 suspended Process 4984 resumed Process 4985 detached [pid 4984] --- SIGCHLD (Child exited) @ 0 (0) --- [pid 4984] mount("//nas/home", ".", "cifs", 0, "ip=<internal ip>,unc=\\\\nas\\home"...) = -1 EACCES (Permission denied) mount error(13): Permission denied Refer to the mount.cifs(8) manual page (e.g. man mount.cifs) Process 4983 resumed Process 4984 detached Mount through terminal strace -f -e trace=mount mount -t cifs //nas/home /mnt/nas -o username=user,password=pass\!wd,uid=1000,gid=100,rw,suid Process 4990 attached Process 4989 suspended Process 4991 attached Process 4990 suspended Process 4990 resumed Process 4991 detached [pid 4990] --- SIGCHLD (Child exited) @ 0 (0) --- [pid 4990] mount("//nas/home", ".", "cifs", 0, "ip=<internal ip>,unc=\\\\nas\\home"...) = 0 Process 4989 resumed Process 4990 detached

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• netlogon errors

  - by rorr

  I have two instances of mssql 2005 and am using CA XOSoft replication. The master is a failover cluster and the replica is a standalone server. They are all running Server 2003 sp2 x64. Same patch levels on all servers. This setup has worked great for several months until we recently restricted the RPC ports on both nodes of the master(5000 - 6000 using rpccfg.exe). We have to implement egress filtering, thus the limiting of the ports. We began receiving login errors for sql windows authentication and NETLOGON Event ID: 5719: This computer was not able to set up a secure session with a domain controller in domain due to the following: Not enough storage is available to process this command. This may lead to authentication problems. Make sure that this computer is connected to the network. If the problem persists, please contact your domain administrator. We also see group policies failing to update and cluster file shares go offline at the same time. The RPC ports were set back to default when we started seeing these problems and the servers rebooted, but the problems persist. The domain controllers are not showing any errors. Running dcdiag and netdiag shows everything is fine. We have noticed that the XOSoft service ws_rep.exe is using a lot of handles(8 - 9k), about the same number that sqlserver is using. As soon as xosoft replication is stopped the login errors cease and everything functions correctly. I have opened a ticket with CA for XOSoft, but I'm not sure that the problem is actually xosoft, but that it is the one bringing the problem to light. I'm looking for tips on debugging RPC problems. Specifically on limiting the ports and then reverting the changes.

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• Networking "chokes" on Windows 7 64 bit

  - by Rohit Nair

  I've been having this problem for some months now, and I have been unable to figure out a solution, or even the cause. At random points throughout the day, my internet connectivity "freezes". I don't get disconnected from my local wireless network. My router doesn't get disconnected from the world. However, for some reason, my computer stops receiving packets. If I'm playing an MMO ( World of Warcraft, in this case, but it has happened with Eve Online as well ) all activity just freezes. If I try to browse, Opera, Firefox and IE all stall at "Waiting for google.com..." or whatever the hostname may be. Inspection with a packet sniffer seems to reveal that there are no incoming packets. Here's the interesting part. Disconnecting from my wireless network and reconnecting fixes the issue. Obviously this led me to conclude that it was a problem with my router or wireless card. However, I have tweaked all the settings on my router that I could think of, including things like QoS, AP Isolation, etc. with no change. My wireless card doesn't really have that many options, and I have uninstalled and reinstalled drivers a few times without any change. Windows Firewall on/off doesn't make a difference. Anyone have any suggestions for debugging this? It's becoming an annoyance.

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• Debian's Wordpress with broken plugin path?

  - by Vinícius Ferrão

  I've installed an Wordpress from Debian Wheezy package system and the plugins folder appears to be broken. As stated in the error log files of Apache2: [error] File does not exist: /var/lib/wordpress/wp-content/plugins/var The plugins are looking for an URL based on the full path, and not on the relative path. I can "temporary fix" the problem making a symbolic link to /var on the plugins folder, but I know that this is wrong and dirty. I don't know where to start debugging this. So any help is welcome. Additional information: /etc/wordpress/htaccess # Multisites generated htaccess RewriteEngine On RewriteBase / RewriteRule ^index\.php$ - [L] # add a trailing slash to /wp-admin RewriteRule ^([_0-9a-zA-Z-]+/)?wp-admin$ $1wp-admin/ [R=301,L] RewriteCond %{REQUEST_FILENAME} -f [OR] RewriteCond %{REQUEST_FILENAME} -d RewriteRule ^ - [L] RewriteRule ^([_0-9a-zA-Z-]+/)?(wp-(content|admin|includes).*) $2 [L] RewriteRule ^([_0-9a-zA-Z-]+/)?(.*\.php)$ $2 [L] RewriteRule . index.php [L] Apache2 Configuration File: <VirtualHost *:80> Alias /wp-content /var/lib/wordpress/wp-content DocumentRoot /usr/share/wordpress ServerAdmin [email protected] <Directory /usr/share/wordpress> Options FollowSymLinks AllowOverride Limit Options FileInfo DirectoryIndex index.php Order allow,deny Allow from all </Directory> <Directory /var/lib/wordpress/wp-content> Options FollowSymLinks Order allow,deny Allow from all </Directory> </VirtualHost> Thanks in advance,

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• Accessing network shares on Windows7 via SonicWall VPN client

  - by Jack Lloyd

  I'm running Windows7 x64 (fully patched) and the SonicWall 4.2.6.0305 client (64-bit, claims to support Windows7). I can login to the VPN and access network resources (eg SSH to a machine that lives behind the VPN). However I cannot seem to be able to access shared filesystems. Windows is refusing to do discovery on the VPN network. I suspect part of the problem is Windows persistently considers the VPN connection to be a 'public network'. Normally, you can open the network and sharing center and modify this setting, however it does not give me a choice for the VPN. So I did the expedient thing and turned on file sharing for public networks. I also disabled the Windows firewall for good measure. Still no luck. I can access the server directly by putting \\192.168.1.240 in the taskbar, which brings up the list of shares on the server. However, trying to open any of the shares simply tells me "Windows cannot access \\192.168.1.240\share You do not have permission to access ..."; it never asks for a domain password. I also tried Windows7 native VPN functionality - it couldn't successfully connect to the VPN at all. I suspect this is because SonicWall is using some obnoxious special/undocumented authentication system; I had similar problems trying to connect on Linux with the normal IPsec tools there. What magical invocation or control panel option am I missing that will let this work? Are there any reasonable debugging strategies? I'm feeling quite frustrated at Windows tendency to not give me much useful information that might let me understand what it is trying to do and what is going wrong.

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• IIS7 Session ID rotating with Classic ASP

  - by ManiacZX

  I am trying to migrate a Classic ASP app onto a Windows 2008 R2 server. The application features run fine, but I am having issue with session. The application keeps the logged in user information in session and I am constantly getting knocked out as if the session had expired. While debugging I have discovered the sessions are not expiring but instead I am getting 2-3 different Session IDs in use by one browser. I am outputting Response.Write(Session.SessionID) on various pages in the application and I can sit there and hit refresh over and over and watch the number changed between these 2-3 SessionIDs randomly. The sessions are still valid because when I refresh and get the Session ID that I logged in under the page is displayed (because the security check was successful) and when I get one of the other Session IDs I get the "you aren't logged in, you need to log in" message. If I close and re-open the browser, same story just the set of IDs are new. This happens with IE8, Firefox and Chrome from multiple computers. Things I've tried: - AppPool set to No Managed Code and Classic - Output Caching set .asp to never cache - ASP Session Properties enabled and disabled asp session state and confirmed it affected page (error trying to read Session.SessionID when disabled) Things I've tried just in case but shouldn't have anything to do with ASP Session: - Disabled compression - Changed ASP.Net Session State properties (InProc, StateServer, SQLServer, Cookies, URI, etc) -

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• Emails from web site sometimes blank or gibberish

  - by John Gardeniers

  Our company has one web site with an online store based on osCommerce. The system sends emails for various reasons, such as password changes, order confirmations, etc., using PHP's mail() function. We occasionally have customers report that the email they received is either blank (email is plain text format) or gibberish (email is in HTML format). In the latter case it's really just HTML that's being displayed as raw text but of course the customers can't read it. In this case the first opening tag's <, and sometimes a few more characters, has gone missing. In an attempt to determine whether this was happening only for certain customers or email systems I configured the web site to send a CC of each message to a service account at my end. Those CC'd messages always arrive intact and display correctly in Outlook. For what it's worth, it seems to happen a little more frequently to Hotmail users but is certainly not limited to them. As the web site is on a shared (Debian) host there's precious little I can do about debugging things from that end, although if I made the right request I feel the hosting company staff would help me, even though they have limited resources to spend on such matters. Any suggestions on what else I might do to try and determine just why those emails are not being received correctly by some customers, yet a CC copy arrives just fine?

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• SMTP Unreachable from Specific Networks

  - by Jason George

  I host my business site through a VPS account. The instance runs Ubuntu and I'm using POSTFIX+Dovecot as my mail server. For the most part, the mail server works fine. I have noticed, however, that I can not send mail from specific local networks. I noticed this at a client's office serval months ago. I can receive email, but any time I tried to send mail when connected to their network the connection would time out. Since I could send my mail after leaving, I chalked it up to improper network configuration and didn't worry about it. Unfortunately I've recently moved, switched service providers, and am forced to use the service providers router due to the special set-up they put in place to give me DSL in the sticks--well beyond the typical range for a DSL run. Now I'm unable to send email from home, which is a problem. I have tried sending email through my phone (using cellular service rather than my DSL) just to confirm the server is currently working. I'm not even sure where start debugging. Any ideas on how I might track down the issue would be greatly appreciated.

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• Active Directory LDAP and user issues (using apache2 for svn access)

  - by CaCl

  I currently have a setup where I work that lets users use their active directory domain logins and passwords to authenticate and authorize access to Subversion. Currently I need to allow application accounts the same access. So our IT group creates application accounts in the active directory for us to use. But they want to be "secure" so they set the "Workstations Allowed" to be only a limited number of workstations. So when an application account hits the apache2 server for authentication they can't login for some reason and I'm having a heck of a time trying to debug. The error logs only show me: [Tue Apr 06 11:24:25 2010] [warn] [client 24.24.24.24] [3469] auth_ldap authenticate: user appuser13 authentication failed; URI /svn [ldap_simple_bind_s() to check user credentials failed][Invalid credentials] [Tue Apr 06 11:24:25 2010] [error] [client 24.24.24.24] user appuser13: authentication failure for "/svn": Password Mismatch I've checked the password numerous times and it appears to be correct but I can't seem to get the user to authenticate properly. Below is a snippet of the apache configuration for ldap: # Auth providers # Active Directory <AuthnProviderAlias ldap ldap1> AuthBasicProvider ldap AuthLDAPURL "ldap://dmain.company.com:389/dc=dmain,dc=company,dc=com?sAMAccountName?sub?(objectClass=*)" AuthLDAPBindDN "CN=svnuser13,OU=Application Accounts,dc=dmain,dc=teradata,dc=com" AuthLDAPBindPassword secret3 </AuthnProviderAlias> # Another set of users from a different group <AuthnProviderAlias ldap ldap2> AuthBasicProvider ldap AuthLDAPURL ldap://diffldapserver:389/dc=specialusers,dc=com?uid </AuthnProviderAlias> # Another set of users from a different group <AuthnProviderAlias file file1> AuthUserFile /var/svn/auth/htpasswd </AuthnProviderAlias> <Location /svn> DAV svn SVNPath /var/svn Satisfy Any Require valid-user AuthType Basic AuthName "SVN Repository" AuthBasicProvider ldap1 file1 ldap2 AuthzSVNAccessFile /var/svn/auth/access AuthzLDAPAuthoritative on Require valid-user </Location> Any help, like tips for debugging is appreciated!

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• GRE Tunnel over IPsec with Loopback

  - by Alek

  I'm having a really hard time trying to estabilish a VPN connection using a GRE over IPsec tunnel. The problem is that it involves some sort of "loopback" connection which I don't understand -- let alone be able to configure --, and the only help I could find is related to configuring Cisco routers. My network is composed of a router and a single host running Debian Linux. My task is to create a GRE tunnel over an IPsec infrastructure, which is particularly intended to route multicast traffic between my network, which I am allowed to configure, and a remote network, for which I only bear a form containing some setup information (IP addresses and phase information for IPsec). For now it suffices to estabilish a communication between this single host and the remote network, but in the future it will be desirable for the traffic to be routed to other machines on my network. As I said this GRE tunnel involves a "loopback" connection which I have no idea of how to configure. From my previous understanding, a loopback connection is simply a local pseudo-device used mostly for testing purposes, but in this context it might be something more specific that I do not have the knowledge of. I have managed to properly estabilish the IPsec communication using racoon and ipsec-tools, and I believe I'm familiar with the creation of tunnels and addition of addresses to interfaces using ip, so the focus is on the GRE step. The worst part is that the remote peers do not respond to ping requests and the debugging of the general setup is very difficult due to the encrypted nature of the traffic. There are two pairs of IP addresses involved: one pair for the GRE tunnel peer-to-peer connection and one pair for the "loopback" part. There is also an IP range involved, which is supposed to be the final IP addresses for the hosts inside the VPN. My question is: how (or if) can this setup be done? Do I need some special software or another daemon, or does the Linux kernel handle every aspect of the GRE/IPsec tunneling? Please inform me if any extra information could be useful. Any help is greatly appreciated.

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• Windows Server 2003 with Apache and IIS causing random faulting and performance issues with Apache?

  - by contrebis

  I'm trying to fix a problem on a Windows Server 2003 SE install which is running IIS6 and Apache webserver (with PHP and MySQL). IIS sites are bound to one IP, Apache to the other. Everything seemed fine till the other IP address was installed to allow a webservice to run under IIS. Symptoms: Apache now responds very slowly, even requests for static files (often 30 seconds or more) Sporadic errors are appearing in the event logs like: Faulting application httpd.exe, version 2.2.14.0, faulting module php5ts.dll, version 5.2.13.13, fault address 0x000ac14f. I've double-checked the config files, taken account of this question/answer http://serverfault.com/questions/51230/running-iis-and-apache-on-the-same-windows-server, upped the Apache log level to debug, run TCPView to check for conflicting bindings, upgraded to latest Apache/PHP versions but still no success or indication of a cause. Any suggestions on where to look, or debugging tips would be gratefully received. I'm a web programmer so not so familiar with Windows Server admin or details of the networking stack. Running PHP under IIS is not an option and hosting on another server is non-ideal.

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• Windows Server 2008 R2, weird intermittent outgoing connection issues, & Hyper-V Virtual Network

  - by brizz

  My provider says that they run an 'unfiltered' network, so it's not a network issue. Not entirely convinced...but they aren't being very helpful. Basically two days ago started having issues with DNS completely stop working for anywhere between 2-20minutes. This happens roughly every 1-2 hours at least once. I later then found that I am unable to ping ANY external IP address when this is going on. So it's not a DNS issue. Whats even more odd is when this is going on, I STAY connected via RDP, and I can access webpages, etc that are on the server when I access from my home computer. Have tried disabling the firewall--no fix. Have checked Event viewer, the only thing that is there is a warning that DNS has stopped working. I have made no changes/updates to the server. The only thing I have done is add an IP address (don't think it has anything to do with the problem, but wanted to mention everything). Any help/insight/suggestions on how to go about debugging would be much appreciated! update: I am also running Hyper-V, and a virtual network. I just tried pinging (when I have issues), from a Hyper-V machine--and it works, when the main server doesn't.

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• Locating memory leak in Apache httpd process, PHP/Doctrine-based application

  - by Sam

  I have a PHP application using these components: Apache 2.2.3-31 on Centos 5.4 PHP 5.2.10 Xdebug 2.0.5 with Remote Debugging enabled APC 3.0.19 Doctrine ORM for PHP 1.2.1 using Query Caching and Results Caching via APC MySQL 5.0.77 using Query Caching I've noticed that when I start up Apache, I eventually end up 10 child processes. As time goes on, each process will grow in memory until each one approaches 10% of available memory, which begins to slow the server to a crawl since together they grow to take up 100% of memory. Here is a snapshot of my top output: PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1471 apache 16 0 626m 201m 18m S 0.0 10.2 1:11.02 httpd 1470 apache 16 0 622m 198m 18m S 0.0 10.1 1:14.49 httpd 1469 apache 16 0 619m 197m 18m S 0.0 10.0 1:11.98 httpd 1462 apache 18 0 622m 197m 18m S 0.0 10.0 1:11.27 httpd 1460 apache 15 0 622m 195m 18m S 0.0 10.0 1:12.73 httpd 1459 apache 16 0 618m 191m 18m S 0.0 9.7 1:13.00 httpd 1461 apache 18 0 616m 190m 18m S 0.0 9.7 1:14.09 httpd 1468 apache 18 0 613m 190m 18m S 0.0 9.7 1:12.67 httpd 7919 apache 18 0 116m 75m 15m S 0.0 3.8 0:19.86 httpd 9486 apache 16 0 97.7m 56m 14m S 0.0 2.9 0:13.51 httpd I have no long-running scripts (they all terminate eventually, the longest being maybe 2 minutes long), and I am working under the assumption that once each script terminates, the memory it uses gets deallocated. (Maybe someone can correct me on that). My hunch is that it could be APC, since it stores data between requests, but at the same time, it seems weird that it would store data inside the httpd process. How can I track down which part of my app is causing the memory leak? What tools can I use to see how the memory usage is growing inside the httpd process and what is contributing to it?

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• Windows 7 BSOD Crashes

  - by Shane Andrade

  I recently upgraded to Windows 7 64 doing a clean install from Vista 64 and ever since I keep getting random blue screen crashes. I have the feeling it's caused by my video card but everything has the most up-to-date drivers for Windows 7 64 bit. Here is the memory dump from my most recent crash: MEMORY_MANAGEMENT (1a) # Any other values for parameter 1 must be individually examined. Arguments: Arg1: 0000000000041790, The subtype of the bugcheck. Arg2: fffffa8001990b90 Arg3: 000000000000ffff Arg4: 0000000000000000 Debugging Details: ------------------ PEB is paged out (Peb.Ldr = 000007ff`fffd9018). Type ".hh dbgerr001" for details PEB is paged out (Peb.Ldr = 000007ff`fffd9018). Type ".hh dbgerr001" for details BUGCHECK_STR: 0x1a_41790 DEFAULT_BUCKET_ID: VISTA_DRIVER_FAULT PROCESS_NAME: csrss.exe CURRENT_IRQL: 0 LAST_CONTROL_TRANSFER: from fffff80002cff26e to fffff80002c8cf00 STACK_TEXT: fffff880`0299ae38 fffff800`02cff26e : 00000000`0000001a 00000000`00041790 fffffa80`01990b90 00000000`0000ffff : nt!KeBugCheckEx fffff880`0299ae40 fffff800`02cc05d9 : fffffa80`00000000 00000000`01e73fff 00000000`00000000 fffff960`0023653f : nt! ?? ::FNODOBFM::`string'+0x339d6 fffff880`0299b000 fffff800`02fa2e50 : fffffa80`09140c90 0007ffff`00000000 00000000`00000000 00000000`00000000 : nt!MiRemoveMappedView+0xd9 fffff880`0299b120 fffff960`002e381b : fffff900`00000000 fffffa80`07c85d10 00000000`00000001 fffff900`c1e56cd0 : nt!MiUnmapViewOfSection+0x1b0 fffff880`0299b1e0 fffff960`002b4fc1 : 00000000`00000000 fffff900`00000000 fffff900`c1e56cd0 00000000`00000000 : win32k!SURFACE::bUnMapImmediate+0x5b fffff880`0299b210 fffff960`002b527b : fffff900`c07fdd10 fffff8a0`00000000 00000000`00000000 00000000`00000000 : win32k!bMigrateSurfaceForConversion+0x5ad fffff880`0299b340 fffff960`002dc3e3 : fffff900`00000000 fffff900`c1e5c010 00000000`00000000 00000000`00000000 : win32k!pConvertDfbSurfaceToDibInternal+0x1cb fffff880`0299b420 fffff960`002b5319 : fffffa80`07c7f470 00000000`00000001 00000000`00000000 00000000`00000282 : win32k!MulConvertChildRedirectionDfbSurfaceToDib+0x53 fffff880`0299b460 fffff960`002b1267 : fffff900`c0132010 fffff900`c0132010 00000000`00000000 00000000`00000000 : win32k!pConvertDfbSurfaceToDib+0x41 fffff880`0299b490 fffff960`002b1b1f : fffff900`c0132010 00000000`00000001 fffff900`c24cc280 fffff900`c0132010 : win32k!bDynamicRemoveAllDriverRealizations+0x4f fffff880`0299b4c0 fffff960`00273bb9 : 00000000`00000000 fffff900`00000000 fffff900`00000000 00000000`00000000 : win32k!bDynamicModeChange+0x1d7 fffff880`0299b5a0 fffff960`000baa2d : 00000000`00000000 00000000`00000000 00000000`00000000 07cd8220`00000003 : win32k!DrvInternalChangeDisplaySettings+0xc7d fffff880`0299b7e0 fffff960`001a2c41 : 00000000`00000040 fffff900`c00bf010 00000000`00000000 07cd8220`00000003 : win32k!DrvChangeDisplaySettings+0x62d fffff880`0299b9c0 fffff960`001a2e9e : fffffa80`07cd8220 00000000`00000000 00000000`00000000 fffff800`02f6fec3 : win32k!xxxInternalUserChangeDisplaySettings+0x329 fffff880`0299ba80 fffff960`001a033a : 00000000`00000000 00000000`00000000 00998b21`81a100b6 00000000`00000040 : win32k!xxxUserChangeDisplaySettings+0x92 fffff880`0299bb70 fffff960`001a053a : 00000000`00000000 00000000`00000001 00000000`00000000 00000000`00000000 : win32k!xxxRemoteSetDisconnectDisplayMode+0x42 fffff880`0299bbb0 fffff960`00183ea6 : 00000000`00000000 fffffa80`06efeb60 fffff880`0299bca0 00000000`00000005 : win32k!xxxRemoteDisconnect+0x1c2 fffff880`0299bbf0 fffff800`02c8c153 : fffffa80`06efeb60 00000000`00000005 00000000`00000020 00000000`00000000 : win32k!NtUserCallNoParam+0x36 fffff880`0299bc20 000007fe`fd6b3d3a : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : nt!KiSystemServiceCopyEnd+0x13 00000000`027cf798 00000000`00000000 : 00000000`00000000 00000000`00000000 00000000`00000000 00000000`00000000 : 0x7fe`fd6b3d3a STACK_COMMAND: kb FOLLOWUP_IP: win32k!SURFACE::bUnMapImmediate+5b fffff960`002e381b f6477401 test byte ptr [rdi+74h],1 SYMBOL_STACK_INDEX: 4 SYMBOL_NAME: win32k!SURFACE::bUnMapImmediate+5b FOLLOWUP_NAME: MachineOwner MODULE_NAME: win32k IMAGE_NAME: win32k.sys DEBUG_FLR_IMAGE_TIMESTAMP: 4a5bc5e0 FAILURE_BUCKET_ID: X64_0x1a_41790_win32k!SURFACE::bUnMapImmediate+5b BUCKET_ID: X64_0x1a_41790_win32k!SURFACE::bUnMapImmediate+5b Followup: MachineOwner

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• Can't seem to get python to work

  - by Justin Johnson

  I'm just starting out in Python. The Python interpreter works from the command line (I have 2.4.3), but I can't seem to get Apache to execute Python scripts. All I end up with is a blank screen and nothing in the Apache error logs. I enabled Python via the Plesk control panel. Here's the snippet that was generated in the httpd.include: <Files ~ (\.py$)> SetHandler python-program PythonHandler mod_python.cgihandler </Files> My test script is one of the examples that comes with the Python downloads at http://python.org/download/ #!/usr/local/bin/python """CGI test 1 - check server setup.""" # Until you get this to work, your web server isn't set up right or # your Python isn't set up right. # If cgi0.sh works but cgi1.py doesn't, check the #! line and the file # permissions. The docs for the cgi.py module have debugging tips. print("Content-type: text/html") print() print("<h1>Hello world</h1>") print("<p>This is cgi1.py") That wasn't working, so I changed #!/usr/local/bin/python to #!/usr/bin/python which is what which python tells me but the results were the same. Like I said, I'm ending up with a blank page. No errors that I know of, unless I'm checking the wrong error log (I'm checking the Apache error log). I'm on a MediaTemple (dv) running CentOS.

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• Passenger throwing undefined method `-@' for "master":String after Puppet 3.0.0 upgrade

  - by Andy Shinn

  My Puppet master is using Passenger to serve. After upgrading to Puppet 3.0.0 I am getting the following error: [ pid=17576 thr=70231398486460 file=utils.rb:176 time=2012-10-01 17:37:12.892 ]: *** Exception NoMethodError in PhusionPassenger::Rack::ApplicationSpawner (undefined method `-@' for "master":String) (process 17576, thread #): from config.ru:7 from /usr/lib/ruby/gems/1.8/gems/rack-1.4.1/lib/rack/builder.rb:51:in `instance_eval' from /usr/lib/ruby/gems/1.8/gems/rack-1.4.1/lib/rack/builder.rb:51:in `initialize' from config.ru:1:in `new' from config.ru:1 My config.ru is as follows: # a config.ru, for use with every rack-compatible webserver. # SSL needs to be handled outside this, though. # if puppet is not in your RUBYLIB: # $LOAD_PATH.unshift('/opt/puppet/lib') $0 = "master" # if you want debugging: # ARGV << "--debug" ARGV << "--rack" # Rack applications typically don't start as root. Set --confdir to prevent # reading configuration from ~/.puppet/puppet.conf ARGV << "--confdir" << "/etc/puppet" # NOTE: it's unfortunate that we have to use the "CommandLine" class # here to launch the app, but it contains some initialization logic # (such as triggering the parsing of the config file) that is very # important. We should do something less nasty here when we've # gotten our API and settings initialization logic cleaned up. # # Also note that the "$0 = master" line up near the top here is # the magic that allows the CommandLine class to know that it's # supposed to be running master. # # --cprice 2012-05-22 require 'puppet/util/command_line' # we're usually running inside a Rack::Builder.new {} block, # therefore we need to call run *here*. run Puppet::Util::CommandLine.new.execute Any idea what may be happening?

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