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• Daemons die with bus error when their binaries live on NFS

  - by mbac32768

  We have some daemons executing on a number of hosts. The daemon executable images are these very large binaries that are hosted on NFS. When the binaries are updated on the NFS server, the previously running daemons sometimes drop dead with a Bus error. I'm assuming what's happening is the NFS server is replacing the binaries in a way that's invisible to the VFS layer on the NFS clients so they end up loading pages from the updated binary, which of course leads to madness. We tried moving the new binaries into place instead of cp, but that doesn't seem to fix it. I'm considering simply mlock()'ing the binary in the daemon startup script, but surely there's magic NFS options or semantics that we should be abusing. Is there a better way to fix this?

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• How to redirect from one web directory to another with Apache

  - by RN

  Apache2 Plesk 9.x I have a website www.example.com and my blog is on www.example.com/blog I have no content on www.example.com as of now So I want all requests for example.com to be redirected to www.example.com/blog How should I do that ? Is this something I can do in Apache? I am using the GoDaddy DNS server. Not sure if it matters- but I have multiple domains hosted n the same server. And I am using Plesk to manage my virtual hosts.

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• 2 GPUs (for multi-monitor setup)

  - by A Dwarf

  I have a machine to which I need to connect a second monitor. This machine currently hosts a ATI Radeon HD 4770 with two DVI adapters. The second monitor to be hooked to this machine is a VGA monitor. Until I find a DVI-VGA adpater, I'm thinking installing a second graphics card which does have a VGA adapter, an NVidia card. Can I successfully run both AMD and NVidia cards on this machine? Any specifics I must be aware of, like how to ensure the ATI card to be the main card? Operating system is Windows 7

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• i am not able to connect to the application hosted on port 80

  - by shiva

  I am trying to access an application that is hosted on port 80. When i try the url from my personal computer , the site is not reachable but the same url on the server( which hosts the application) i am able to access the site. When i disable the firewall then i am able to access the site from my pc. So there is some rule which is blocking this port. How do i determine what windows firewall rule is blocking this port. I have disables IIS as well. Kindly point me in the right direction

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• IIS cannot access itself

  - by dave

  We are on a corporate network that uses ISA and I am having issues trying to not have requests go through ISA. I have IIS7 on my local Windows 7 machine that has websites and a service layer. The websites access the service layer using a xxxx.servicelayer.local address that is set up in my HOSTS file to point to 127.0.0.1. I have Windows Firewall client which I have disabled. I have tried both adding this address into IE so that it does not go through ISA and also disabled this section altogether. When the website (which is actually IIS making the request to itself) tries to access the service layer I receive an ISA error that proxy authentication has failed. Considering that everything I can see to configure is set to not go through the proxy, ISA, I cannot see how this is actually going through the proxy and giving this error. Is there something within Windows 7 that forces the proxy setting, some sort of caching or similar?

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• Wired and wireless conections: force Windows to connect to laptop through Ethernet?

  - by danielkza

  I have a desktop connected to the internet and to my home network through Wi-Fi, and a latptop connected to said desktop through an Ethernet cable. But Windows seems to only reach the laptop through Wi-Fi: I want to transfer files through the wired connection instead. Setting up Internet Connectin Sharing and disconnecting the laptop from Wi-Fi altogether doesn't seem like the most elegant solution to me. I also thought about going to the hosts file and setting up the IP address manually, but that would make the laptop completely unavailable if it's not wired, which happens quite often unfortunately. Is there any way for me to tell Windows to use the wired connection for a particular host if possible, and fallback to any other route it finds otherwise?

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• Dell EqualLogic vs. EMC VNXe [closed]

  - by Untalented

  We've been looking into SMB SANs and based on the competitive pricing I've been getting we're really liking these two array's. There are some pro's to both solutions, but I've unable to really decide which to choose. The EMC offers better expandability since you can buy an additional shelf (roughly $1200) and can add drives then to the array. However, the Dell unit is still very nice. Can anyone comment on their experiences with the two and thoughts on this? Also, to get the VMware Storage API support you need VMware Enterprise. How much additional performance does this provide? It's roughly $15k more than the Essentials Plus bundle we're looking at (this is a small environment [3 Hosts 1 Array].

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• approx via inetd is not open to connection for others machines

  - by Cédric Girard

  I have an approx server to speed up Debian apt updates, on my Ubuntu 11.04 desktop PC, it had ran fine in the past, but today le 9999 port is open from localhost, but not for others PC. I have not modified inetd configuration at all. What can I check and try? inetd.conf 9999 stream tcp nowait approx /usr/sbin/approx /usr/sbin/approx approx.com # Here are some examples of remote repository mappings. # See http://www.debian.org/mirror/list for mirror sites. debian http://ftp2.fr.debian.org/debian security http://security.debian.org/debian-security volatile http://volatile.debian.org/debian-volatile # The following are the default parameter values, so there is # no need to uncomment them unless you want a different value. # See approx.conf(5) for details. $cache /espace/Dossiers/approx $max_rate unlimited $max_redirects 5 $user approx $group approx $syslog daemon $pdiffs true $offline false $max_wait 10 $verbose false $debug false I tried to allow others PC to connect with a "ALL: ALL" in hosts.allow. ufw is disabled, iptables-save is empty.

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• How much memory should my rails stack be consuming?

  - by Hamish

  I am running my own webserver on a 384MB VPS from Slicehost to serve two Ruby on Rails applications on separate Virtual Hosts. I am running Phusion Passenger with Apache2. The following is the contents of my Passenger.conf <IfModule passenger_module> PassengerRoot /opt/ruby-enterprise-1.8.6-20090610/lib/ruby/gems/1.8/gems/passenger-2.2.11 PassengerLogLevel 0 PassengerRuby /usr/local/bin/ruby PassengerUserSwitching on PassengerDefaultUser nobody PassengerMaxPoolSize 3 PassengerMaxInstancesPerApp 2 PassengerPoolIdleTime 300 # Ruby on Rails Options RailsAutoDetect on RailsSpawnMethod smart NameVirtualHost *:80 If i do a 'top' on my server I have 314MB used on average, this seems like too much? Am I mistaken and if not what possible steps can I take to reduce the Memory usage? Thanks!

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• Exim force TLS for specific destination domain

  - by helpmhost

  Hi, I need to configure Exim to require TLS when sending emails to a specific domain. I know that I can use hosts_require_tls = host in the smtp transport. But it sounds like that requires that I set the host of the receiving mail server. I would instead like to specify the domain. Also, if I use this, will all other hosts/domains work without TLS? Just want to confirm before I implement. Thanks.

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• Linux Bridge, Samba netbios name/hostname access

  - by Christopher Wilson

  I am currently running a linux bridge in the following configuration ADSL Modem: 192.168.1.1 Linux Bridge: eth0: 192.168.1.2 eth1: no address Wireless Router: 192.168.0.1 My issue is that i cannot access the "Linux Bridge" shares using the WINS name of the server via client systems (yes i understand it is a transparent bridge but i can access it via the 192.168.1.2 address this is not on the same subnet as the client systems). This is the global section of my SMB.CONF [global] unix extensions = off os level = 20 netbios name = server guest account = nobody server string = 447 Server security = share #unix extensions = no #wins support = yes #wins server = 192.168.0.1 name resolve order = wins lmhosts hosts bcast interfaces bridge1 eth0 eth1 lo bind interfaces only = yes Can i access a bridged server using it's WINS name to access samba shares? Cheers Chris

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• Mercurial mirror: abort: No such file or directory: http://[...]/00manifest.i

  - by Sridhar Ratnakumar

  I am trying to setup a daily mirror of a mercurial repository - code.python.org in particular - within our local network, and serve that via Apache HTTPD. On the remote host that hosts apache, I did this: $ cd /var/www $ hg clone http://code.python.org/hg/trunk/ On my macbook, I ran: $ hg -v clone http://remote/trunk/ (falling back to static-http) abort: No such file or directory: http://remote/trunk/.hg/store/00manifest.i Google does not show any relevant result for this particular error. I remember back in those days being able to setup Bazaar mirrors by a simple clone. Doesn't Mercurial work like that? How do I setup a mirror that must further act like a clone URL?

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• Configuring Linux Network

  - by Reiler

  Hi I'm working on some software, that runs on a Centos 5.xx installation. I'ts not allowed for our customers to log in to Linux, everything is done from Windows applications, developed by us. So we have build a frontend for the user to configure network setup: Static/DHCP, ip-address, gateway, DNS, Hostname. Right now I let the user enter the information in the Windows app, and then write it on the Linux server like this: Write to /etc/resolv.conf: Nameserver Write to /etc/sysconfig/network: Gateway and Hostname Write to /etc/sysconfig/network-scripts/ifcfg-eth0: Ipaddress, Netmask, Bootproto(DHCP or Static) I also (after some time) found out that I was unable to send mail, unless I wrote in /etc/hosts: 127.0.0.1 Hostname All this seems to work, but is there a better/easier way to do this? Also, I read the network configuration nearly the same way, but if I use DHCP, I miss som information, for instance the Ip-address. I know that I can get some information from the commandline (ifconfig), but I dont get for instance Hostname, Gateway and DNS. Is there a commandline tool that will display this?

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• Debian 5 is randomly shutting down.

  - by revofreak

  My debian 5 vps is suffering from random shutdowns. I reinstalled it several times, the hosts moved me to a different physical box, check the install image and said everyone else also uses it and is fine. Heres the output from syslog Mar 27 00:19:19 noobintraining-1 -- MARK -- Mar 27 00:32:01 noobintraining-1 shutdown[18142]: shutting down for system halt Mar 27 00:32:06 noobintraining-1 init: Switching to runlevel: 0 Mar 27 00:32:06 noobintraining-1 xinetd[15907]: Exiting... Mar 27 00:32:07 noobintraining-1 named[15865]: received control channel command 'stop -p' Mar 27 00:32:07 noobintraining-1 named[15865]: shutting down: flushing changes Mar 27 00:32:07 noobintraining-1 named[15865]: stopping command channel on 127.0.0.1#953 Mar 27 00:32:07 noobintraining-1 named[15865]: stopping command channel on ::1#953 Mar 27 00:32:07 noobintraining-1 named[15865]: no longer listening on ::#53 Mar 27 00:32:07 noobintraining-1 named[15865]: no longer listening on 127.0.0.1#53 Mar 27 00:32:07 noobintraining-1 named[15865]: no longer listening on 89.238.172.132#53 Mar 27 00:32:07 noobintraining-1 named[15865]: exiting Mar 27 00:32:07 noobintraining-1 exiting on signal 15 Any help is most appreciated!

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• How much packet loss is normal?

  - by Fabian

  I started monitoring our network using SmokePing. Users occasionally complain about bad network connections, but the problems went away after some minutes usually. I now wanted to get some more quantitative information about those problems. SmokePing regularly pings servers inside our network, in a connected network and outside hosts. I only have a limited amount of control over our internal network and none at all for the connection to the outside and to the second network. I now see quite often (2-4 times a day) that packets to the second network and the outside are dropped. Most of the times it is 1-2 packets out of 20, sometimes more. Inside our internal network no packets are dropped. Is this an expected amount of packet loss, or does it indicate that something is wrong? I'm mainly wondering if I should bother the university IT department about it, or if I should just accept it as it is.

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• download/export emails from webmail

  - by misterjinx

  hello, I'm just switching my hosts and I want to move the emails from my accounts too. In order to have my current emails on the new host I want to download/export them and to import at the other host. In order to do this I use one of the webmail (squirrelmail, roundcube, horde) clients available on my current host. The problem is that except for roundcube, I don't see any download/export option available. And in roundcube I can only select one email at a time and download it as eml. My question is how do I export/download all the emails from one account and import them at the new host? I know this is possible because I remember doing this some time ago using squirrelmail, but I can't find anything related to this now. Thank you.

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• Bacula vs. BackupPC

  - by chronoz

  I have been googling about the differences between them. Bacula has lots of roles BackupPC is easier to configure Bacula works with agent, not rsync (great for Windows backups) It seems that Bacula is most often compared to Amanda though, while BackupPC seems a perfectly lovely and popular backup distribution to. I currently backup my servers with rsnapshot, but I am looking for a professional scalable solution that could also back-up 50 hosts without problems. Preferably a solution that can offer bare metal restores for my Linux servers. I am not looking to reinstall the exact same version of Plesk, the software, etc...

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• iptables NAT configuration

  - by Sarp Kaya

  Hello I am experiencing some issues with my iptables. Here's what I want to do: A(eth0)--------(eth0)B(eth2)---------------(eth2)C Brackets are interface names A,B and C are hosts. Now I would like to forward port number 80 of host C so that It would be accessed via host A. host A is 192.168.1.254 host C is 192.168.3.2 I intentionally ACCEPTed all FILTER chain options as the default policy because I wanted to make sure that NAT is working properly first. I enabled ip_forward. So here's what I have done: sudo iptables -A PREROUTING -t nat -p tcp - d 192.168.1.254 -j DNAT --to 192.168.3.2 However it is not working. What am I missing here?

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• IPv6 6to4 on Windows Server

  - by Graham Wager

  I'm looking for a relatively simple guide to setting up IPv6 properly on a home network. This network currently has a server (Windows Server 2008R2) running RRAS that establishes connectivity to the internet using a demand-dial PPPoE connection and handles the NAT. It also hosts a DNS server and DHCP. My ISP does not support IPv6, but I have a static IPv4 address. I've read about 6to4 and signed up at tunnelbroker.net, but quickly felt out of my depth. How do I configure my network to use it, and how I should configure my DHCP server with regards to IPv6 addresses?

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• How to rename database without first stopping SQL instance to flush connections

  - by John Galt

  Is there a way to force a database into single user mode so a script can be run to rename databases? I find I have to Restart the instance of SQL (to force off any connections from a web app, etc.) and then I can run this script: USE master go sp_dboption MDS, "single user", true go sp_dboption StagingMDS, "single user", true go sp_renamedb MDS, LastMonthMDS go sp_renamedb StagingMDS, MDS go sp_dboption LastMonthMDS, "single user", false go sp_dboption MDS, "single user", false go After this script runs, I can restart IIS for my web app and it can connect to the new production database. All the above works well and we've been doing this for years but now we've upgraded to SQL 2008 and the SQL2008 instance also hosts other databases that support other web apps. So, rather than using a Restart of the whole SQL instance to enable subsequent single-user mode on 2 databases, is there a less intrusive way of accomplishing this? Thanks.

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• How to remove the dlinksearch browser search hijack

  - by Bish

  Hi Gang, For the last few weeks all the machines on my home network are having the same problem whilst browsing the internet. When the user enters an invalid URL in the browser address bar, instead of the default browser behaviour, the request is sent to http://www1.dlinksearch.com/. As far as I can tell this is all machines and all browsers. It is so consistent I am wondering whether it has anything to do with our router. We use a DLink DIR-655 router so maybe the clue is in the name :) Anyhow, I cannot figure out how to disable/remove the offending behaviour. I've checked hosts files, spyware, AV etc. etc. Anybody have any ideas? Paul P.S. Apologies if this is not the right place to ask this type of question. I'm a bit stuck

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• Route an IP from WAN to a host on LAN on OpenWRT

  - by Zsub

  EDIT: I know how to use NAT, I specifically want the server to be reachable on two IP's, one private, one public, with the firewall of the OpenWRT in between, if feasible. At the office we have recieved a /29 from our ISP. The first address is reserved for their endpoint, so I'm free to use five addresses. We run a local network, so of course there is a router in between running OpenWRT to provide all hosts with (W)LAN (dhcp from a private range). However, we also have a server running OS X Server 10.6 (Snow Leopard) and I'd like that server to be accessible both from the LAN using a private IP as well as from the WAN on it's own public IP. Point of note is that the server only has one network port, so multiple NICs is not an option, unfortunately. How would I go about doing this?

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• Set up Windows SBS dns server and vpn clients from brench office

  - by mn

  I have got some clients from bench office which connects vpn to main office. The Router from bench office assigned addresses from DHCP 192.168.1.0/255.255.255.0 and remote gateway assigned vpn ip addresses 10.10.20.0/255.255.255.0. There is a DNS server (Active Directory Win SBS 2000) and vpn client are registered with vpn address (10.10.20.0/255.255.255.0 and domain company.com.pl). I would like to register also primary bench subnet 192.168.1.0/255.255.255.0 with domain for example company.vpn.local I want to access vpn hosts for example: dev3.copmany.pkb.local and dev3.company.com using my Win SBS 2000 DNS server.

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• A website hosted on the 1.0.0.0/8 subnet, somewhere on the Internet?

  - by Dave Markle

  Background I'm attempting to demonstrate, using a real-world example, of why someone would not want to configure their internal network on the 1.0.0.0/8 subnet. Obviously it's because this is not designated as private address space. As of 2010, ARIN has apparently allocated 1.0.0.0/8 to APNIC (the Asia-Pacific NIC), who seems to have begun assigning addresses in that subnet, though not in 1.1.0.0/16, 1.0.0.0/16, and others (because these addresses are so polluted by bad network configurations all around the Internet). My Question My question is this: I'd like to find a website that responds on this subnet somewhere and use it as a counter-example, demonstrating to a non-technical user its inaccessibility from an internal network configured on 1.0.0.0/8. Other than writing a program to sniff all ~16 million hosts, looking for a response on port 80, does anyone know of a directory I can use, or even better yet, does anyone know of a site that's configured on this subnet? WHOIS seems to be too general of a search for me at this point...

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• Bandwidth monitor for apache websites

  - by bmaynard

  I am after a web application that will parse apache log files and record how much bandwidth the user has used. We have several virtual hosts that have custom log files and the I/O is recorded at the end of the logfile. However I can't find an application that will parse multiple log files and display a summary for each site. I believe awstats can do this but I want to be able to see all of my clients in one list. If there is something that integrates into cacti then that would be perfect.

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