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Wierd Networking Problem
by Shawn Everett 01 Nov '07

01 Nov '07

Hi Guys, I'm 100% sure this is not a Linux issue but I want a second opinion... I have a Linux server running CentOS. It was been absolutely perfect without any errors or problems. Since Monday it has been unable to send email. It is configured to act as a smart host. All email gets forwarded to smtp.isp.net. The server is on a network behind a firewall completely nat'd. No ports are forwarded to it. telnet smtp.isp.net 25 generates the following: Trying a.b.c.d... Connected to smtp.isp.net. Escape character is '^]'. And then nothing. All other machines can connect to smtp.isp.net 25 without a problem. They also use that host for their outgong mail server. Using links to surf the web has a similar result. It just hangs traceroute and nslookups work correctly. There are no errors anywhere. The network in question has various routing and vlan configurations, proxy servers and such. I tend to suspect they're the problem. They're also not in my control. The firewall does show the Linux box attempting to make SMTP connections but nothing else. Any ideas or suggestions would be appreciated. I have not yet rebooted the server. Shawn

4 6

handling kernel panics
by Andy Harrison 31 Oct '07

31 Oct '07

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 I have a problem with a couple of my centos servers hitting a kernel panic about once a week or so. I find them sitting at a panic screen like this: http://img228.imageshack.us/img228/1044/screenshotoakpanicma4.jpg (58k) Two questions: 1) How do I make it reboot after a panic instead of sitting in a hung state? 2) How do I turn on logging so that I can see the entire kernel panic message? I tried changing syslog.conf so that kern.* goes to /var/log/messages instead of just kern.debug, but all that did was make booting a little more verbose in the log. - -- Andy Harrison public key: 0x67518262 -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.5 (GNU/Linux) Comment: http://firegpg.tuxfamily.org iD8DBQFHKK/pNTm8fWdRgmIRAjG8AKCWBUqCbl63Qrt3xjawyFeuY671vwCbBjoM +chmlC5ZHBAeh8jIMSKKKsU= =nY30 -----END PGP SIGNATURE-----

2 1

Systems management with "func" (new Fedora project)
by Michael DeHaan 31 Oct '07

31 Oct '07

There's a systems management app several of us are working on in Fedora space many of you may be interested in... https://hosted.fedoraproject.org/projects/func/ Basically func is a way to address multiple-systems at once, like SSH, but with much easier certificate distribution and pluggable XMLRPC modules (written in Python), and easy scriptability. Func's certmaster can also be used to distribute certificates to other programs for use in their communications. You can read more on the project page. There are some interesting demo apps bundled with it, like an inventory application (that uses git for storing differences), and a script which can tell you which computers on your network have exploding laptop batteries :) There are also some neat modules that can gather data from nagios plugins without having to actually have nagios installed. Anyhow, if you are interested, check out the project page and join the mailing list. We have func already submitted to Fedora, it should be in EPEL shortly, and if someone wants to include this in CentOS testing that's great too. We are very interested in people contributing new modules and scripts for things they find interesting/useful. Feedback/ideas/comments welcome. Thanks! --Michael

1 0

Re:Re: [CentOS] upgrade bind to version 9.3.4-P1 in centos 5.0, box
by BellHuang 31 Oct '07

31 Oct '07

hi Jim Perrin, thanks for your great info as following: No, and this is not the case. The bind version provided with centos (all versions) has security fixes backported into them. Do not rely on the version numbers as a means of assuming security fixes. See http://www.redhat.com/advice/speaks_backport.html for details. regards, Bell

1 0

Enable Repositories: [Errno 14] HTTP Error 404: Not Found
by Simon Jolle "sjolle" 31 Oct '07

31 Oct '07

-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA1 Hi Centos Users How to enable Repositories mentioned in "What are all the CentOS repositories (directories) and what is each one for?" [0] # yum -y update Loading "installonlyn" plugin Loading "protectbase" plugin Setting up Update Process Setting up repositories base 100% |=========================| 1.1 kB 00:00 updates 100% |=========================| 951 B 00:00 http://centosk.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://centosi.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://centosr.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://centose.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://centosh.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://centosf.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://centosg.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://centosj.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://centoso.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. http://centosn.centos.org/centos/5/contrib/i386/repodata/repomd.xml: [Errno 14] HTTP Error 404: Not Found Trying other mirror. Error: Cannot open/read repomd.xml file for repository: contrib [0] http://www.centos.org/modules/smartfaq/faq.php?faqid=33 cheers Simon - -- actually, I think Windows Vista has done more than virtually any OS release to promote the use of Linux (Slashdot Kommentar, 4. Oct 07) -----BEGIN PGP SIGNATURE----- Version: GnuPG v1.4.6 (GNU/Linux) iD8DBQFHKGTHEMN/lNE/wrwRAgx3AJ0XeBmrbCBaAs6dL5qsSQCm9bRPDgCeOgA0 8wFsmXXjh8bDk8sPQZLUTaI= =gbhs -----END PGP SIGNATURE-----

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why type "perl -MCPAN -e shell" -> "install XML::Simple" on CentOS 5?
by Rogelio 31 Oct '07

31 Oct '07

I'm running nmap2nagios.pl, and I notice that on CentOS 5, I had to run the following to get it working (when I didn't have to do the same on CentOS 4) perl -MCPAN -e shell (answer questions) > install XML::Simple Why is that?

4 5

OT: Apache config error
by carlopmart 30 Oct '07

30 Oct '07

Hi all, I have setup a local yum repository for CentOS-3 and CentOS-5. Servers can download and install updates correctly, but apache returns me this error every time that a centos-3 machine do a yum update: [Tue Oct 30 12:36:48 2007] [error] [client 172.25.50.30] (70014)End of file found: mod_mime_magic: read failed from uncompress of /data/www/softmirror/distros/CentOS/3/os/i386/headers/octave-6-2.1.50-6.i386.hdr with every .hdr file... Somebody knows how can I fix this??? Thanks. -- CL Martinez carlopmart {at} gmail {d0t} com

2 2

rate limiting question between two hosts
by Rogelio 30 Oct '07

30 Oct '07

If I need to rate limit file transfers between to machines, what can I do at the host-level within CentOS, and what might I need to "yum install" in order to do? (For example, say I would like to rsync something, and then I would like to make sure that I don't exceed, say, 10 Mbs.)

3 3

Help with PERL install of GD
by Scott Ehrlich 30 Oct '07

30 Oct '07

In an attempt to install bugzilla on a 64-bit C5 system, following http://www.nabble.com/bugzilla-3.0.x-installation-on-FC7-t4656333.html Most all modules from that page install fine, but GD install attemps keep crashing. What am I missing? Thanks. Scott

4 6

upgrade bind to version 9.3.4-P1 in centos 5.0 box
by BellHuang 30 Oct '07

30 Oct '07

hi, i want to setup DNS server on centos 5.0, and find the preinstalled version is bind.x86_64 30:9.3.3-7.el5 , and bind.x86_64 30:9.3.3-9.0.1.el5 in the updates repository. but i need to upgrade bind to version 9.3.4-P1 to prevent from any known security bugs is there any way i can do ? thanks, Bell

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