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Dell OpenManage,Server Update Utility
by Clint Dilks 17 Nov '09

17 Nov '09

Hi, Has anyone used this with CentOS 4 recently ? If so is it still a case of needing to munge /etc/redhat-release and then everything works ?

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openvpn server: one client works; one fails.
by Mike - email ignored 17 Nov '09

17 Nov '09

I installed an openvpn-2.0.9 server on my new CentOS 5.4 box from using the same parameters I used on a Fedora box I retired. Now I have a dual boot laptop that has WinXP and Fedora FC8. Both of these partitions have openvpn clients installed that have worked well in the past. After adjusting these for new IP addresses, I find: WinXP: connects and contacts boxes on the same LAN as the server. FC8 appears to connect but will not contact anything. Since I have nested routers, I was able to disconnect from the real WAN, and use an emulated WAN. I then shut off iptables on both Linux boxes. The behavior was not altered. BTW, I use TAP rather than TUN. I have run out of ideas. Suggestions would be most welcome. Thanks, Mike.

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kernel panic on 4.8 i686
by Jerry Geis 17 Nov '09

17 Nov '09

I am getting the following kernel panic: 2.6.9-89.0.16.EL #1 Tue Nov 3 17:15:02 EST 2009 i686 i686 i386 GNU/Linux This system has ran fine for 2 years+. Nov 17 10:09:21 kernel: Call Trace: Nov 17 10:09:21 kernel: [<c014c9d3>] wake_up_page+0x9/0x29 Nov 17 10:09:21 kernel: [<c015e1ad>] do_no_page+0x37d/0x3f4 Nov 17 10:09:21 kernel: [<c015e41b>] handle_mm_fault+0xec/0x212 Nov 17 10:09:21 kernel: [<c011decd>] do_page_fault+0x1ac/0x4dc Nov 17 10:09:21 kernel: [<c017a811>] copy_strings+0x22b/0x235 Nov 17 10:09:21 kernel: [<c017c3b0>] search_binary_handler+0xe4/0x1f2 Nov 17 10:09:21 kernel: [<c017c6aa>] do_execve+0x1ec/0x1f6 Nov 17 10:09:21 kernel: [<c011dd21>] do_page_fault+0x0/0x4dc Nov 17 10:09:21 kernel: [<c0323f9b>] error_code+0x2f/0x38 System has 1 GIG ram, SATA disk running in RAID-1. /proc/mdstat shows everything is fine on the array. It started to panic last week. I upgrade from 4.4 to 4.8 and same thing is still happening. Looking back further in the messages I see this also: Nov 17 10:09:21 kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000108 Nov 17 10:09:21 kernel: printing eip: Nov 17 10:09:21 kernel: c014c9b8 Nov 17 10:09:21 kernel: *pde = 3a57a067 Nov 17 10:09:21 kernel: Oops: 0000 [#1] Nov 17 10:09:21 kernel: Modules linked in: md5 ipv6 autofs4 sunrpc ipt_REJECT ipt_state ip_conntrack iptable_filter ip_tables cpufreq_powersave dm_mirror dm_mod button battery ac uhci_hcd ehci_hcd snd_via82xx snd_ac97_ Nov 17 10:09:21 kernel: CPU: 0 Nov 17 10:09:21 kernel: EIP: 0060:[<c014c9b8>] Not tainted VLI Nov 17 10:09:21 kernel: EFLAGS: 00010206 (2.6.9-89.0.16.EL) Nov 17 10:09:21 kernel: EIP is at page_waitqueue+0x17/0x29 Nov 17 10:09:21 kernel: eax: 88200020 ebx: c1400020 ecx: 00000020 edx: 00000000 Nov 17 10:09:21 kernel: esi: c1400020 edi: 00000000 ebp: c1b34c00 esp: f0379e8c Nov 17 10:09:21 kernel: ds: 007b es: 007b ss: 0068 Nov 17 10:09:21 kernel: Process zcat (pid: 13339, threadinfo=f0379000 task=ecb6f1a0) Nov 17 10:09:21 kernel: Stack: c014c9d3 c1400020 fffd1a58 c015e1ad fffd4000 e0007000 62708f43 635c49ae Nov 17 10:09:21 kernel: c17279e0 00000000 e07a9a20 00296ae0 ee0ac9fc 00000001 c1b34c00 00296ae0 Nov 17 10:09:21 kernel: f03e4000 ee0ac9fc c015e41b 00000000 fffd1a58 f03e4000 00000000 c1b34c00 What might be happening here? Jerry

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Installing a PHP class
by Joseph L. Casale 17 Nov '09

17 Nov '09

Guys, Web/php stuff is outta my area to say the least. I need to setup a php class called Advanced Graphing Class. It has php, font and js files that need to be made available. How and where do I set this up to be available to any virtual host that uses it? A link to where this is documented would be great, I have been searching obviuolsy using the wrong lingo... Thanks! jlc

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Keeping iptables in sync across multiple machines
by Karanbir Singh 17 Nov '09

17 Nov '09

hi, Just wondering what people use / recommend to keep multiple machines in sync with their iptables policy. What I use at the moment: 1) Puppet, to setup and manage a fairly complex per service type ruleset that is then maintained on the remote machines by puppet ( in that it brings together all the various bits of iptables snippets based on what manifests and roles are deployed to a machine, then builds a firewall locally on the mchine ). We also use something similar, but at a much simpler level within the .centos.org infrastructure. Problem with this is that unless one is familliar with the whole stack of machine state/policy management, its quite intimidating. Which then means that there is plenty of breakage, which in turn then means I need to maintain and run a complete set of VM's that emulate the production environment ( including their IP's ) and run cross VM tests before stuff gets rolled out. So yes, large hole and lots of potential for non-related issues to impact release. Some people even argue that having a release based workflow for firewall's is not good, I'd like to disagree :) 2) In another setup, I use puppet to basically just manage static /etc/sysconfig/iptables files. Pretty low tech, and very easy to cause damage since testing-rollout-deploy is impossible. But the other guy who also needs to manage these seems to find it easy. 3) Yet another setup I've used in the past was with a svn repo and using a post-commit hook, run some tests followed by clusterssh! to deploy the iptables files and restart services. Finally replaced that with a slack based deployment, since that allowed me to atleast run some santity tesing and rollback if I ended up locking 'core' host. The problem ofcourse was that its not easy to test remote inbound connections this way ( without using a proxy, but then the proxy creates another layer of problems and flakyness ). 4) Physically logging into machines to make policy changes(!) I do this for my laptop's :) 5) Using a 'git pull' from cron on a bunch of machines, and using a central git repository. Each machine would then do a iptables reload, the only advantage of this over (3) is that I can use metainfo like TAG's and ROLE's in the commit log's, and have only specific machines react to specific changes. Flip side: needing to track and build a knowledgebase around these TAG's meant that I almost never ever use this, and prefer to just have firewall policy that mostly works for the whole set of machines I run this on. So, what I am looking for really is feedback on what people are using in the wild on multiple machines, and bonus points for people who only use tools and mechanisms already built into the CentOS [base] repo. - KB

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CentOS Enterprise IPA (Identity, Policy, and Audit) Server
by Johnny Hughes 17 Nov '09

17 Nov '09

I have just completed building the RPMS for the CentOS Enterprise IPA (Identity, Policy, and Audit) Server. This is based on the sources from the Red Hat Enterprise IPA server. Documentation can be downloaded here: http://www.centos.org/docs/5/pdf/eipa/1.0/ The RPMS are located in the testing repository. http://dev.centos.org/centos/5/testing/SRPMS/CEIPA/ http://dev.centos.org/centos/5/testing/i386/RPMS/CEIPA/ http://dev.centos.org/centos/5/testing/x86_64/RPMS/CEIPA/ For anyone who wants to test EIPA, please install and provide feedback on this thread: http://bugs.centos.org/view.php?id=3880 Thanks, Johnny Hughes

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Capturing video
by centos＠911networks.com 17 Nov '09

17 Nov '09

Hi, I'm trying to watch: http://www.video.bhphotovideo.com/?fr_story=a405075c1837a65dbee4f4d48db9a26… It's within flash and the problem is that even in slow mode I get 20 seconds, then a few minutes later another 10 to 20 secs... I have CentOS 5.3, Firefox 3.0.15 with the flash enabled. Is there a way of capturing the whole video, and then playing it locally? -- Thanks

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Re: [CentOS] Installing a PHP class
by m.roth＠5-cent.us 17 Nov '09

17 Nov '09

>>Err.. software without installation documentation :/. Anyway, looks like >>you only need to drop files to php lib directory (look from php.ini) and >>then follow example.. > > Well that was my first try, so I tried to lookup if that lib path was > recursive anyway, is it important that all files be in one directory in > this path? > You do understand php paths and includes, right? You want it somewhere that is in that. And I vaguely think that you might need to "register" it using pear. mark

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Re: [CentOS] Installing a PHP class
by m.roth＠5-cent.us 17 Nov '09

17 Nov '09

> Guys, > Web/php stuff is outta my area to say the least. I need to setup a php > class called Advanced Graphing Class. It has php, font and js files that > need to be made available. > > How and where do I set this up to be available to any virtual host that > uses it? > > A link to where this is documented would be great, I have been searching > obviuolsy using the wrong lingo... Um, yes. Is "advanced graphing class" a package, like mediawiki, or is it a php module? A php class is something that's part of the language and code, so asking how to set it up doesn't make sense here, that's programming. mark

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Adaptec SCSI Card 2930LP supported by CentOS 5.x?
by Frank Thommen 17 Nov '09

17 Nov '09

Hi, for a specific application we need a low-profile SCSI card (PCI) with external 50pin connector. I thought about getting an "Adaptec SCSI Card 2930LP". However I was not able to find any usable information about wether this card is supported by Linux/CentOS 5.x or not. Does anyone have this card working with a CentOS 5.x machine? Alternatively: Are there any linux-supported low-profile PCI SCSI cards with 50pin connector which are supported by CentOS 5.x and which you can recommend? Thanks in advance frank -- Frank Thommen - Structures IT Management and Support - EMBL Heidelberg frank.thommen(a)embl-heidelberg.de - +49 6221 387 8353

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