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• Is Ubuntu a bad distro for a standalone mysql database server?

  - by DhruvPathak

  I read an article here : http://www.mysqlperformanceblog.com/2011/12/08/which-linux-distribution-for-mysql-server/ On the other end there are Debian and Ubuntu. Both use tool called dpkg for package management. There isn’t a month that I log in to a system based on either distribution where there are no issues with packages consistency. Unfinished installations, unresolved conflicts are so common that it’s just beyond simple negligence. The packaging system is just not robust enough. Another problem is that one broken package may block you from installing or uninstalling anything else. Imagine that someone left system in such shape, you prepared for downtime, stopped MySQL and… error – text editor has not been properly installed, so you cannot upgrade MySQL either until the problem is fixed. In a stressful situation when downtime clock ticks – annoying at best We prefer Ubuntu server because of familiarity and Ubuntu also being development environment. Questions: Is Ubuntu used commonly in production for a mysql database server ? Is it worth the trouble ever to have one distro eg Ubuntu in web server, and another say Red Hat in database server ? Or Is a homogenous server pool a better choice ?

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• Exim, hot to route local mail to other adress

  - by kheraud

  I have setuped an Exim4 server on my debian wheezy server. This mail server only sends mail coming from localhost. The purpose is sending mail for my website. I have cron tasks and other services generating mails for root user. These mails are not stored in /var/mail as before, but sent by exim to [email protected]. I try to make exim send mails for root to [email protected] rather than [email protected]. I tried adding a .forward in /root with [email protected] as content. I tried also changing /etc/aliases with root: [email protected]. The fact is that routing works for root@localhost but not for root which is resolved as [email protected] I tested how routing is resolved with exim -bt : root@srv02:~# exim -bt root@localhost R: system_aliases for root@localhost R: dnslookup for [email protected] [email protected] <-- root@localhost router = dnslookup, transport = remote_smtp host gmail-smtp-in.l.google.com [173.194.67.27] MX=5 host alt1.gmail-smtp-in.l.google.com [74.125.143.27] MX=10 host alt2.gmail-smtp-in.l.google.com [74.125.25.27] MX=20 host alt3.gmail-smtp-in.l.google.com [173.194.64.27] MX=30 host alt4.gmail-smtp-in.l.google.com [74.125.142.27] MX=40 root@srv02:~# exim -bt root R: dnslookup for [email protected] [email protected] router = dnslookup, transport = remote_smtp host aspmx.l.google.com [173.194.78.27] MX=1 host alt1.aspmx.l.google.com [74.125.143.27] MX=5 host alt2.aspmx.l.google.com [74.125.25.27] MX=5 host alt4.aspmx.l.google.com [74.125.142.27] MX=10 host alt3.aspmx.l.google.com [173.194.64.27] MX=10 I bet this is a matter of how my server is configured (rather than how exim is configured). But to understand well I would like to have a solution for both : how to have root resolved as root@localhost ? how to have [email protected] routed to [email protected] ?

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• Strange issue in header location redirect

  - by hd01

  I have three websites hosted (example1.com, example2.com, example3.com) on a server. There is a page (test.php) on example1.com with just code below inside it: <?php header('Location:http://example2.com/a.php'); ?> When I browse test.php it goes to http://example1.com/a.php . it doesn't understand it is another domain url, it tried to find the page on itself. but when I put http://google.com instead of example2.com/a.php it works correct. I really get confused. What is the problem ? Should I set some configuration on the server? ( I am administrator of the hosting server ). Ps. The server is behind a pound server. Here's the Firebug Net output for example1.com/test.php Response Headers: HTTP/1.1 302 Found Date: Tue, 09 Oct 2012 09:03:34 GMT Server: Apache/2.2.16 (Debian) Location: http://example1.com/a.php Vary: Accept-Encoding Content-Encoding: gzip Content-Length: 21 Keep-Alive: timeout=15, max=100 Connection: Keep-Alive Content-Type: text/html; charset=utf-8 Request Headers: Accept text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8 Accept-Encoding gzip, deflate Accept-Language en-us,en;q=0.5 Connection keep-alive Cookie mycookie Host example1.com User-Agent Mozilla/5.0 (X11; Linux i686; rv:14.0) Gecko/20100101 Firefox/14.0.1

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• Revamping an old and unstable office IT-solution using Windows Server and OpenVPN

  - by cmbrnt

  I've been given the cumbersome task to totally redo the IT-infrastructure for a customer's office. They are currently running Windows XP all over, with one computer acting as a file server with no control over which users have access to which files, and so on. To top it off, this file server also functions as a workstation, which means it gets rebooted every time the user notices some sluggish behavior or experiences problems with flash games. To say the least, this isn't working for them. Now - I've got a very slim budget, but I need to set up a new server, and I wish to run Windows Server 2008 on it. I also need the ability to access the network remotely via VPN. Would it be a good idea to install VMware ESXi 4.1 onto the new server, and then run Windows Server 2008 as well as a separate Debian install for openvpn on it? I don't like the Domain Controller for the future AD to also run a VPN-server, because of stability issues when something goes to hell with either of them. There will be no redundancy though. However, I'm not sure if there is something to gain by installing a VPN solution on the Windows Server itself, when it comes to accessing file shares on the network via VPN. I don't know how to enable users logging in via the VPN to access the remote files, since they will be accessing the network from their own home computers (which is indeed a really bad idea, but this is what I've got to work with). They won't be logged in to the windows Domain, but rather their home workgroups. I need to be able to grant access to files in certain directories based on the logged in AD-user, but every computer won't necessarily be configured to log into the domain. I'm not sure how to explain this in a good way, but I'd be happy to clarify if somethings not clear. Any help would be great, because I've got a feeling that I can't do this without introducing a bunch of costly new rules when it comes to their IT-solution. I'd rather leave that untouched and go on my merry way to the next assignment.

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• 100% CPU when doing 4 or more concurrent requests with Magento

  - by pancake

  Currently I'm having trouble with a server running Magento, it's unbelievably slow. It's a VPS with a few Magento installations on it used for development, so I'm the only one using them. When I do 4 request all 2 seconds after each other I'm finished in 10 seconds. Slow, but still within the limits of my patience. When I do 4 "concurrent" requests, however (opening 4 tabs in a row, very quickly) all four cores go to 100% and stay there for like a minute. How is this possible? I know that there are a lot of possibilities here, so any tips on how to make an Apache/PHP server go faster are also welcome. It used to go a lot faster before, and I've also tried APC, but it kept causing problems (PHP errors, something with memory pools) so I've disabled it. By the way, the Magento cache is off and compiling is also off. I know this makes Magento slower than usual, but I don't think a 60 second response time is normal for any Magento installation. Virtual hardware: 4 Cores and 4096MB RAM Swap is never used (checked with htop) 100GB disk space, of which 10% is in use Software: Debian 6 DirectAdmin and apache custombuild PHP 5.2.17 (CLI) If you need more info, please tell me how to get it, because I probably don't know how. I do know how to use the command line in linux and the usage of quite a few commands, but my experience with managing a server is limited.

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• Samba access works with IP address only

  - by Sebastian Rittau

  I added a Debian etch host (hostname: webserver, IP address: 192.168.101.2) running Samba to a Windows network with a Windows 2003 PDC (IP address 192.168.101.3). The Samba server exports a public guest share, called "Intranet". The server shows up fine in the network, but trying to click on it produces an error dialog, stating I don't have the necessary permissions. So does entering \webserver manually and using \webserver\internet states that the path does not exist. Interestingly, accessing the share by IP address (\192.168.101.2 or \192.168.101.2\intranet) works fine. DNS is configured correctly, and "smbclient //webserver/intranet" on another Linux client works fine. One complicating issue is that the webserver is only a VMware virtual machine running on PDC server. Here is our smb.conf: [global] workgroup = Foobar server string = Webserver wins support = yes ; commenting out these wins server = 192.168.101.3 ; two lines has no effect dns proxy = no guest account = nobody [... snipped some unrelated bits, like logging ...] security = share [... snipped some password-related things ...] domain master = no [intranet] comment = Intranet path = /srv/webserver/contents browseable = yes guest ok = yes guest only = yes read only = yes create mask = 0775 directory mask = 0775

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• can't install anything anymore with apt-get

  - by Aymane Shuichi

  Welcome this is the log I have when trying to install anything (php5-fpm after removing it) apt-get install php5-fpm Reading package lists... Done Building dependency tree Reading state information... Done php5-fpm is already the newest version. 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. 1 not fully installed or removed. After this operation, 0 B of additional disk space will be used. Do you want to continue [Y/n]? y Setting up php5-fpm (5.4.4-14+deb7u10) ... insserv: warning: script 'S55IptabLes' missing LSB tags and overrides insserv: warning: script 'S55IptabLex' missing LSB tags and overrides insserv: There is a loop between service IptabLes and mountnfs if started insserv: loop involving service mountnfs at depth 8 insserv: loop involving service networking at depth 7 insserv: loop involving service mountnfs-bootclean at depth 10 insserv: There is a loop between service rc.local and mountall if started insserv: loop involving service mountall at depth 6 insserv: loop involving service checkfs at depth 5 insserv: loop involving service kbd at depth 11 insserv: There is a loop between service rc.local and mountall-bootclean if started insserv: loop involving service mountall-bootclean at depth 7 insserv: loop involving service urandom at depth 9 insserv: There is a loop between service IptabLes and mountdevsubfs if started insserv: loop involving service mountdevsubfs at depth 2 insserv: loop involving service udev at depth 1 insserv: There is a loop at service rc.local if started insserv: There is a loop at service IptabLes if started insserv: Starting IptabLes depends on rc.local and therefore on system facility `$all' which can not be true! (x99 times repeated ) insserv: Max recursions depth 99 reached insserv: loop involving service postfix at depth 2 insserv: There is a loop between service IptabLes and udev if started insserv: loop involving service mountkernfs at depth 1 insserv: loop involving service IptabLes at depth 1 Now here is the error i get insserv: exiting now without changing boot order! update-rc.d: error: insserv rejected the script header dpkg: error processing php5-fpm (--configure): subprocess installed post-installation script returned error exit status 1 Errors were encountered while processing: php5-fpm E: Sub-process /usr/bin/dpkg returned an error code (1) The biggest operation I held before this was updating nginx from 1.2 to 1.6 and it was thanks to this site : here is the link : How to upgrade nginx from 1.2 to 1.6 on debian 7 Please help !

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• Boot stuck at blinking cursor before GRUB - only works via BIOS boot menu

  - by delta1

  I have a new box running Debian Squeeze. Grub is installed on /dev/sda, but when booting up I just get a blinking cursor, before the Grub menu. I can only boot to grub successfully when I choose boot options (during post) and select that specific drive! I have made sure the correct drive is set to boot first in the BIOS. So Grub works, but the system won't boot to that drive automatically? Any ideas on what could cause this? Drives sda/b/c are all 2TB (sda runs the system with b/c as raid device md0) with the following partitions: $ cat /proc/partitions major minor #blocks name 8 0 1953514584 sda 8 1 977 sda1 8 2 9765625 sda2 8 3 6445313 sda3 8 4 1937302627 sda4 8 32 1953514584 sdc 8 16 1953514584 sdb 9 0 1953513424 md0 but # fdisk -l /dev/sda gives WARNING: GPT (GUID Partition Table) detected on '/dev/sda'! The util fdisk doesn't support GPT. Use GNU Parted. Disk /dev/sda: 2000.4 GB, 2000398934016 bytes 255 heads, 63 sectors/track, 243201 cylinders Units = cylinders of 16065 * 512 = 8225280 bytes Sector size (logical/physical): 512 bytes / 512 bytes I/O size (minimum/optimal): 512 bytes / 512 bytes Disk identifier: 0x00000000 Device Boot Start End Blocks Id System /dev/sda1 1 243202 1953514583+ ee GPT Any insight into this strange behaviour would be greatly appreciated.

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• Setting up a global MySQL Cluster in the cloud

  - by GregB

  I'm giving the question an overhaul to more specifically identify where I need help. I use two tools to manage a bunch of cloud server: Puppet and Rundeck. Both of these can be configured to use a mysql backend. I'd like to setup an instance of each application in both the U.S., and the U.K., treating the U.K. servers as hot stand-bys in case of failure in the U.S. I want to use a MySql cluster so that the data is automatically replicated from the U.S. to the U.K. Because these are hot standbys, high performance is not a goal. Redundancy and data integrity are most important. My question revolves around the setup of the mysql cluster. I want to run three servers, each one running a data node, a sql node, and a management node. Is this a valid configuration for mysql server? If so, could someone point me in the right direction for creating such a setup? I've downloaded the offical tarball, and the official debian, and the documentation for them contradicts many of the online tutorials. I'm installing on Ubuntu 10.04.

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• Revamping an old and unstable IT-solution for a customer?

  - by cmbrnt

  I've been given the cumbersome task to totally redo the IT-infrastructure for a customer's office. They are currently running Windows XP all over, with one computer acting as a file server with no control over which users have access to which files, and so on. To top it off, this file server also functions as a workstation, which means it gets rebooted every time the user notices some sluggish behavior or experiences problems with flash games. To say the least, this isn't working for them. Now - I've got a very slim budget, but I need to set up a new server, and I wish to run Windows Server 2008 on it. I also need the ability to access the network remotely via VPN. Would it be a good idea to install VMware ESXi 4.1 onto the new server, and then run Windows Server 2008 as well as a separate Debian install for openvpn on it? I don't like the Domain Controller for the future AD to also run a VPN-server, because of stability issues when something goes to hell with either of them. There will be no redundancy though. However, I'm not sure if there is something to gain by installing a VPN solution on the Windows Server itself, when it comes to accessing file shares on the network via VPN. I don't know how to enable users logging in via the VPN to access the remote files, since they will be accessing the network from their own home computers (which is indeed a really bad idea, but this is what I've got to work with). They won't be logged in to the windows Domain, but rather their home workgroups. I need to be able to grant access to files in certain directories based on the logged in AD-user, but every computer won't necessarily be configured to log into the domain. I'm not sure how to explain this in a good way, but I'd be happy to clarify if somethings not clear. Any help would be great, because I've got a feeling that I can't do this without introducing a bunch of costly new rules when it comes to their IT-solution. I'd rather leave that untouched and go on my merry way to the next assignment.

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• How do I set up postfix to store e-mail in a file instead of relaying it?

  - by GomoX

  I want to run a staging copy of a production server on a local environment. The system runs a PHP application, which sends e-mail to customers in various scenarios and I want to make sure no e-mail is ever sent from the staging environment. I can tweak the code so it uses a dummy e-mail sender, but i'd like to run the exact same code as the production environment. I can use a different MTA (Postfix is just what we use in production), but I'd like something that is easy to set up under Debian/Ubuntu :) So, I'd like to set up the local Postfix install to store all e-mail in (one or more) files instead of relaying it. Actually, I don't really care how it's stored as long as it's feasible to check the e-mail that was sent. Even a set up option that tells postfix to keep the e-mail in the mail queue would work (I can purge the queue when I reload the staging server with a copy from production). I know this is possible, I just haven't found any good solution online for what seems like a fairly common need. Thanks!

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• Reading log files from web application

  - by Egorinsk

  Hi! I want to write a small PHP application for monitoring logs on a Debian server, including syslog logs and Apache/PHP messages. The problem here is that Apache user (www-data) has no access to /var/log directory. What would be the best way to grant an access to logs for PHP application? Let's assume that log files can be really large, like hundreds of megabytes. I have some ideas: Write a shell script that would be run via sudo and tail last 512 Kb of log into a separate file that can be read by application - that's ineffective, because of forking a new process and having to read data twice Add www-data to adm group (that can read logs) - that's insecure Start a PHP process via cron every minute to read logs — that's not very good, because it doesn't allow real-time monitoring. Also, this script will be started even when I don't read logs, and consume CPU time (server is in the cloud, and I'll have to pay for it) Create a hardlink for all log files with lowered permissions - I guess, that won't work because logrotate could recreate log files and they'll change inode number. Start a separate nginx/Apache server under privileged user that may read logs. Maybe anyone got a better solution?

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• 2.6.9 Kernel on virtual server (non upgradable) - any expected problems?

  - by chris_l

  Hi, I'm considering to rent a virtual server (for me personally). The product I'm currently looking at offers IMO fair pricing, very good hardware etc. The only problem is, that I won't be able to do an upgrade to a newer kernel than 2.6.9 (running Debian Etch). Also, I can't install my own kernel modules. (The server runs with Virtuozzo, so as far as I understand it, it just does some chroot instead of a real virtualization (?)) I want to run GlassFish, Postgres, Subversion, Trac and maybe some other things on it. It will also have to employ a firewall, and provide OpenSSL for https. Ideally, it would also be able to do AIO (asynchronous IO), which could speed up some server I/O. Should I expect problems with that old kernel version, in conjunction with the software I want to install (I'd like to use current versions of the software)? One thing I already found out, is that you can't do everything with iptables, since some kernel modules are missing/things are not build into the kernel. GlassFish v3 appears to run fine at first glance. I was able to test the server for a few hours. Installing my whole setup wasn't feasible in that time, but what I can say is, that it's amazingly fast for an entry-level vserver, especially hard disk and network performance (averaging at ca. 400MBit/s). So if the kernel won't be a problem, I'd really like to take it. Thanks, Chris PS Exact kernel version: 2.6.9-023stab051.3-smp

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• How to set up multi users on dev server with git and github

  - by Derek Organ

  I'm working on lamp application. We have 2 servers (Debian) Live and Dev. I constantly work on dev main to add new features and fix bugs. When happy all works well I scp the relevant code to the Live system. Database (mysql) is local to each machine. Now this is pretty basic setup really and I want to improve the workflow a bit. I use git and github for version control. Admittedly I've only really used one branch. Their can be 3 different developers who work on the code at different times. We all use the same linux username to connect to the dev server and edit the code directly when needed. I usually then commit and push the code at the end of the day to github. One thing to bare in mind is it isn't easy to run this code on a local machine as there are many apache and subdomain configurations that wouldn't work on a local machine so it is important to work on the dev server not locally. I need to create a new process because we need to have a main trunk now and a branch with a big code re-write. What is the best way to do this. Should I create different unix logins for each developer and set up different working areas on the dev server for there changes? e.g. /var/www/mysite_derek /var/www/mysite_paul /var/www/mysite_mike my thinking is they can do a pull from the main branch and then create there own branch and merge it back in. I'm not sure how this will work though with git locally and with github. will i need to create different github user accounts as well. I'd like to do this the 'right' way and future proof for having lots of potential developers but I also don't want to over complicate it. I simple and elegant solution is preferred. any recommendations or suggestions?

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• File exists but is unreadable by PHP

  - by Aron

  More than once I have ran into this issue: I have a cache file that is automatically generated by PHP. It contains some generated PHP code. However for some reason the file cannot be read and parsed by PHP. These are the symptoms: File actually exists on file system. Using Terminal you can navigate to the file, view its contents (which are fully intact), etcetc. PHP file_exists() will report that the file exists...which is correct since it does :) Then I include() the file. But when actually parsing the file, PHP will just consider it an empty file. No fatal error, just no PHP code actually executed. Again, its as if the file was completely empty (which I assure you, it is not)... It is not a permissions issue. Permissions are set as needed. Workaround: open the file in Terminal via 'nano' or some other text editor and just save it to the disk again. After that (despite no changes to the content) PHP will run it just fine... As a clarification, I'd like to add that this happens rarely, but frequently enough to be a problem. And even when it does, there are hundreds of other similar files on the same system that work without a problem... If this were an issue affecting only my own scripts, I would consider that there must be a bug in the way I generate the PHP code. But no, the issue has occurred more than once when deploying to a server (usually from Beanstalk repository via FTP). The issue has been present on various servers, Debian and Ubuntu running Zend Community Server. Any ideas? One that crossed my mind was opcode cache-ing (part of Zend Server CE)...could it be that an empty version of the file is cached if it is requested while the write operation is still in progress?

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• How can I generate filesystem images that are usable on many different virtualization systems?

  - by Mark Longair

  I have written a script that generates a root filesystem image (based on Debian lenny) suitable for User-Mode Linux. (Essentially this script creates a filesystem image, mounts it with a loop device, uses debootstrap to create a lenny install, sets up a static IP for TUN/TAP networking, adds public keys for login by SSH and installs a web application.) These filesystem images work pretty well with UML, but it would be nice to be able to generate similar images that people can use on alternative virtualization software, and I'm not familiar with these options at all. In particular, since the idea is to use this image as a standalone server for testing the web application, it's important that the networking works. I wonder if anyone can suggest what would be involved in customizing such root filesystem images such that they could be used with other virtualization software, such as VMware, Xen or as an Amazon EC2 instance? Two particular concerns are: If such systems don't use a raw filesystem image (e.g. they need headers with metadata or are compressed in some particular way) do there exist tools to convert between the different formats? I assume that in the filesystem, at least /etc/network/interfaces will have to be customized, but are more involved changes likely to be necessary? Many thanks for any suggestions...

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• What are secure ways of sharing a server (ssh+LAMP) with friends?

  - by Bran the Blessed

  What is the best way to share a virtual server with friends? More precisely, I have the following assets: A virtual private server (Debian Lenny) with root access for myself, running... SSH apache2 mysql Some unused disk space Some friends in need of hosting The problem I would now like to do the following: Hosting one or several domains per friend My friends should have full access to their domains, including running PHP scripts, for example My friends should not be able to poke around in other directories The security of my server should not be compromised by faulty PHP scripts To clarify: I do trust my friends in the sense that they are not trying to do something evil with their access. I just do not trust the programs they are going to run. So, what are your recommendations for establishing such a scenario? Partial solution I already came up with the following plan: Add chrooted SSH users for my friends Add Apache vhosts per user (point the directories to subdirectories of the homedirectories, i.e. /home/alice/example.com, /home/bob/example.net, etc. But how can I enforce a chroot-like environment for the scripts they are running within these vhosts? Any pointers would be appreciated.

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• Does OS X support linux-like features?

  - by Xeoncross

  I have been using XP for almost a decade. Contrary to popular belief, it has served me well. In the last 4 years I don't remember ever having it crash on me. It has the most stable GUI I have ever used. However, an OS is only as good as it's GUI AND command line combined. Windows command line is awful and totally useless. So I have been using Ubuntu for a couple years and Debian on my servers. The only problem is that Gnome applications (ubuntu 6-10) constantly crash on me (Ubuntu Studio was the most unstable OS I ever used). I have high quality Gigabyte, MSI, and Asus motherboards and CPU's from old Semprons/Athlons to Celerons/Core 2 Quads. What are the odds that every PC I have ever owned can't remain stable with a linux GUI? Not to mention that Adobe CSx Suite doesn't work on linux. Anyway, I am now looking at moving to a MAC in the hope of finding a stable GUI and a feature-packed command line. Does Mac OS have an integrated command line where I can do linux-like-awesomeness like rsync, ssh, wget, crong jobs, package updates, and git without having an unstable GUI? Basically, until the linux GUI applications get a little better, is OS X what I need?

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• Can only ssh when not using wifi

  - by AChrapko

  So I have 3 machines, a windows 7 desktop that is always wired to my router, osX laptop, and raspberry pi running debian linux. My router is a Linksys e1000 wireless N. My goal is to be able to ssh the raspi from any machine, while it is connected via wifi. My problem is that when trying to ssh from either the win7 or osX to the Pi it either times out, or gives an error: "ssh: connect to host 192.168.1.### port 22: No route to host" The only times that I have managed to connect to the pi from any machine were when it connected to the router via an Ethernet cable. Currently with win7 desktop wired, macbook wireless, and pi wireless tests give the following: win7 ping macbook: Destination host unreachable. macbook ping win7: Request timeout. win7 ping pi: Destination host unreachable. macbook ping pi: Request timeout. blah blah blah Plugging the macbook into the router with an Ethernet cable all communication between win7 and macbook works. Pings, ssh, ftp, smb ect... No changes to the pi, still no connections possible to or from any of the other 2 machines. Note All machines, are able to connect to the internet and ssh to the same machine on a completely different network, wired or over wifi. Plugging the Pi in with Ethernet (and macbook still wired) I can ssh to the pi from both win7 and macbook. I can ssh from the pi to macbook. All machines still able to connect the the off network machine. Also another little side note- I was playing warcraft 3 with my roommates the other day, and the only time they were able to see my LAN game was when they were plugged into the router with an Ethernet cable. Once or twice one of the laptops was able to connect over wifi, but not without another computer connecting first via Ethernet. So basically does anyone have any info as to why my router seems to completely ignore local wireless traffic?

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• How do I find and kill a php loop (process)?

  - by Hoytman

  I have a php script that I have been developing which calls an external api within a loop. It is being tested on a VPS which is running LAMP on Debian. I noticed this morning that the api was not responding to my script. When I called the provider, they told me that my server had been calling the api 1000's of times per hour for the past 10 hours. I am assuming that a php script (which I have been working on the day before and testing on my VPS) entered into an infinite loop during one of the executions, and never came out (I have been testing it from the command prompt, and not over the web.) I have attempted to stop and start Apache, but the api support staff says that the calls are still coming in from my server address. How can I find and stop the process? Also, is there a possibility that the Apache stop/start solved the problem, but the api is still trying to sort through past calls? Please forgive me for not using my local test environment correctly. Edit: I do not know the process name, I need to discover the name (or pid) based on behavior.

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• Summer daylight time not changing on some active directory domain clients.

  - by Nick Gorbikoff

  We just had a summer daylight change in US. and pc's on my network are behaving strange, some of them change time and some didn't. My network: 2 locations both in Midwest, same time zone. Location 1: 120 pcs (windows xp & windows 200) , with 1 Active Direcotry Domain Controller on Windows 2003 Standard. A couple of windows 2000 servers (they up to date) the rest of the servers are Xen or Debian machines (all up to date) , Second location connected through OpenVPN link all pc's are running fine - but they are all connecting to our AD domain controller. Locaiton 2: 10 pcs, and a shared LAN NAS. Both of the routers/firewalls in both locations are pFsense boxes with ntp service running - but it's up to date. Tried all the usual suspects: I have all the latest updates installed restarted them domain controller is running fine most computers are running fine I have only one domain controller on my network also my firewall serves as ntp server (pfsense) but it's up to date. all of the linux machines are fine since they are querying firewall / router for the time. about 1/3 of my pcs are 1 hour behind. If I change them manually they just change back ( the way domain pc's are supposed to). I've tried everything but I can't think of anything else to try.

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• IPTables Reroute SSH based on Connection string?

  - by senrabdet

  We are using a cloud server (Debian Squeeze) where public ports on a public IP route traffic to internal servers. We are looking for a way to use IPTables and ssh where based on some part of the ssh connection string (or something along these lines) iptables will reroute the ssh connection to the "right" internal server. This would allow us to use one common public port, and then re-route ssh connections to individual servers. So, for example we hope to do something like the following: user issues ssh connection (public key encryption) such as ssh -X -v -p xxx [email protected] but maybe adds something into the string for iptables to use iptables uses some part of that string or some means to re-route the connection to an internal server using something like iptables -t nat -A PREROUTING ! -s xxx.xxx.xxx.0/24 -m tcp -p tcp --dport $EXTPORT -j DNAT --to-destination $HOST:$INTPORT ....where $HOST is the internal ip of a server, $EXTPORT is the common public facing port and $INTPORT is the internal server port. It appears that the "string" aspect of iptables does not do what we want. We can currently route based on the IP table syntax we're using, but rely on having a separate public port for each server and are hoping to use one common public port and then re-route to specific internal servers based on some part of the ssh connection string or some other means. Any suggestions? Thanks!

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• Tunnell network requests with Windows 7

  - by mark

  I've Windows 7 64bit Pro client in a private LAN behind a Netgear wgr614v7 router. I've also a remote Debian server machine outside. I'd like to tunnel all (or specified ports/protocols) over this outside server, so when I'm on the Windows machine and I request serverfault.com it would not appear from the wgr614v7 public IP but from the server. But it's not only about HTTP traffic, it's basically about everything I'd like to: other TCP ports, even UDP, etc. It must be transparent to the application, e.g. they shouldn't be aware of this. All their requests just appear as being from the server and the tunnel between them takes care about the packets. I'm aware of e.g. Putty and forwarding individual ports or using it as a socks proxy, however not many applications to support this and the support in windows itself looks non-existent to me. I might add it should be something "reasonable" easy to set up. I've heard about PPTP but I'm unsure about it's security implications (by design). Should I go for VPN? There seem to be two common solutions for Linux (OpenSwan and StrongSwan), why would I pick the one over the other? I also fear that setting up a VPN might be quite complex, OTOH maybe it's the only sane way to do the things right? Or is OpenVPN sufficient? I'm seeking for open (source) solutions, what other options to I have or which direction should I head to?

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• Linux: Three default gateways?

  - by Daniel

  My server has three default gateways, how can that be? Shouldn't there be one default gw? I have three NICs, each attached to a separate subnet: server1:~# route Kernel IP routing table Destination Gateway Genmask Flags Metric Ref Use Iface 10.5.0.0 * 255.255.255.224 U 0 0 0 eth3 localnet * 255.255.255.224 U 0 0 0 eth0 192.168.8.0 * 255.255.255.192 U 0 0 0 eth1 default 10.5.0.1 0.0.0.0 UG 0 0 0 eth3 default 192.168.8.1 0.0.0.0 UG 0 0 0 eth1 default 10.1.0.1 0.0.0.0 UG 0 0 0 eth0 Sometimes, I can't ping a host on the Internet, sometimes I can. What I want is traffic to the Internet (0.0.0.0) routed through a specific NIC. Can I just add a route for 0.0.0.0 and default gw to one of the eth0-3 interfaces? Will it break my connection? I'm using Debian, here is my /etc/network/interfaces: # This file describes the network interfaces available on your system # and how to activate them. For more information, see interfaces(5). # The loopback network interface auto lo iface lo inet loopback # The primary network interface allow-hotplug eth0 iface eth0 inet static address 10.1.0.4 netmask 255.255.255.224 network 10.1.0.0 broadcast 10.1.0.31 gateway 10.1.0.1 allow-hotplug eth1 iface eth1 inet static address 192.168.8.4 netmask 255.255.255.192 network 192.168.8.0 broadcast 192.168.8.63 gateway 192.168.8.1 allow-hotplug eth3 iface eth3 inet static address 10.5.0.4 netmask 255.255.255.224 network 10.5.0.0 broadcast 10.5.0.31 gateway 10.5.0.1

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• Using Plesk for webhosting on Ubuntu - Security risk or reasonably safe?

  - by user66952

  Sorry for this newb-question I'm pretty clueless about Plesk, only have limited debian (without Plesk) experience. If the question is too dumb just telling me how to ask a smarter one or what kind of info I should read first to improve the question would be appreciated as well. I want to offer a program for download on my website hosted on an Ubuntu 8.04.4 VPS using Plesk 9.3.0 for web-hosting. I have limited the ssh-access to the server via key only. When setting up the webhosting with Plesk it created an FTP-login & user is that a potential security risk that could bypass the key-only access? I think Plesk itself (even without the ftp-user-account) through it's web-interface could be a risk is that correct or are my concerns exaggerated? Would you say this solution makes a difference if I'm just using it for the next two weeks and then change servers to a system where I know more about security. 3.In other words is one less likely to get hacked within the first two weeks of having a new site up and running than in week 14&15? (due to occurring in less search results in the beginning perhaps, or for whatever reason... )

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