Discuss November 2008

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254 discussions

SYD flood dropped on Sendmail (centos 4.x)
by Chris Heiner 22 Nov '08

22 Nov '08

My guys, My firewall seems to block an attack my Centos / Sendmail boxes on port 110. These servers require a reboot after each attack. My firewall says it's blocked? Do I need to patch something on sendmail? Or is my firewall not doing its job (Sonicwall)? This is not the first time this has happened. 11/20/2008 02:53:04.864 - SYN flood attack dropped - 75.2.205.141, 48102 - 10.80.80.210, 110 11/20/2008 03:08:04.864 - SYN flood attack dropped - 75.2.205.141, 64955, greatcooks.biz - 10.80.80.220, 110 11/20/2008 03:23:08.864 - SYN flood attack dropped - 75.2.205.141, 43068, greatcooks.biz - 10.80.80.210, 110 Any input would be much appreciated. Thanks.

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Re: [CentOS] I need help with CentOS installation on a Core 2 Duo Laptop
by James B. Byrne 22 Nov '08

22 Nov '08

Reply-To: <8e47efdc0811200539w9a901ffodef8fd5b6f61a91c(a)mail.gmail.com> On Thu, Nov 20, 2008 at 2:50 AM, Sadaruwan Samaraweera <slinuxworld(a)gmail.com> wrote: > I tried this option "linux acpi=off pciommconf" as well but the > problem is when I use this I can install the OS but when try to boot > on to the OS it's hang up on the boot up progress bar screen of the > CentOS and I can't do any thing. So I checked it with the text mode > loader it was the same problem can any one help me to over come this. Probably a shot in the dark but, try linux pci=nommconf without the acpi=off. Fingers crossed... -- *** E-Mail is NOT a SECURE channel *** James B. Byrne mailto:ByrneJB@Harte-Lyne.ca Harte & Lyne Limited http://www.harte-lyne.ca 9 Brockley Drive vox: +1 905 561 1241 Hamilton, Ontario fax: +1 905 561 0757 Canada L8E 3C3

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A working example to use rsyslog as log centralized host
by carlopmart 22 Nov '08

22 Nov '08

Hi all, Somebody can helps me with rsyslog configuration to use it as a log centralized server?? I am trying several configs without luck, and all examples that I found are related to v3 and nothing about v2 that ships with CentOS or RHEL. I am trying to do something like this: $template DynFile,"/var/log/rsyslog/%HOSTNAME%/secure" if $source != 'localhost' and $syslogfacility-text == 'authpriv' then -?DynFile But this is for version 3 ... and doesn't works ... Any help?? -- CL Martinez carlopmart {at} gmail {d0t} com

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any ima ge software suggestion
by adrian kok 21 Nov '08

21 Nov '08

Hi I am trying to clone harddrive eg: centos, freebsd, openbsd..... any ima ge software suggestion for different os Thank you Send instant messages to your online friends http://uk.messenger.yahoo.com

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CentOS-announce Digest, Vol 45, Issue 13
by centos-announce-request＠centos.org 21 Nov '08

21 Nov '08

Send CentOS-announce mailing list submissions to centos-announce(a)centos.org To subscribe or unsubscribe via the World Wide Web, visit http://lists.centos.org/mailman/listinfo/centos-announce or, via email, send a message with subject or body 'help' to centos-announce-request(a)centos.org You can reach the person managing the list at centos-announce-owner(a)centos.org When replying, please edit your Subject line so it is more specific than "Re: Contents of CentOS-announce digest..." Today's Topics: 1. CESA-2008:0972 Important CentOS 4 x86_64 kernel security update (Karanbir Singh) 2. CESA-2008:0972 Important CentOS 4 i386 kernel security update (Karanbir Singh) ---------------------------------------------------------------------- Message: 1 Date: Thu, 20 Nov 2008 14:26:01 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2008:0972 Important CentOS 4 x86_64 kernel security update To: centos-announce(a)centos.org Message-ID: <20081120142601.GA4435(a)vkalu.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2008:0972 Important https://rhn.redhat.com/errata/RHSA-2008-0972.html The following updated files have been uploaded and are currently syncing to the mirrors: x86_64: kernel-2.6.9-78.0.8.EL.x86_64.rpm kernel-devel-2.6.9-78.0.8.EL.x86_64.rpm kernel-doc-2.6.9-78.0.8.EL.noarch.rpm kernel-largesmp-2.6.9-78.0.8.EL.x86_64.rpm kernel-largesmp-devel-2.6.9-78.0.8.EL.x86_64.rpm kernel-smp-2.6.9-78.0.8.EL.x86_64.rpm kernel-smp-devel-2.6.9-78.0.8.EL.x86_64.rpm kernel-xenU-2.6.9-78.0.8.EL.x86_64.rpm kernel-xenU-devel-2.6.9-78.0.8.EL.x86_64.rpm src: kernel-2.6.9-78.0.8.EL.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos @irc.freenode.net ------------------------------ Message: 2 Date: Thu, 20 Nov 2008 14:26:01 +0000 From: Karanbir Singh <kbsingh(a)centos.org> Subject: [CentOS-announce] CESA-2008:0972 Important CentOS 4 i386 kernel security update To: centos-announce(a)centos.org Message-ID: <20081120142601.GA4423(a)vkalu.karan.org> Content-Type: text/plain; charset=us-ascii CentOS Errata and Security Advisory 2008:0972 Important https://rhn.redhat.com/errata/RHSA-2008-0972.html The following updated files have been uploaded and are currently syncing to the mirrors: i386: kernel-2.6.9-78.0.8.EL.i586.rpm kernel-2.6.9-78.0.8.EL.i686.rpm kernel-devel-2.6.9-78.0.8.EL.i586.rpm kernel-devel-2.6.9-78.0.8.EL.i686.rpm kernel-doc-2.6.9-78.0.8.EL.noarch.rpm kernel-hugemem-2.6.9-78.0.8.EL.i686.rpm kernel-hugemem-devel-2.6.9-78.0.8.EL.i686.rpm kernel-smp-2.6.9-78.0.8.EL.i586.rpm kernel-smp-2.6.9-78.0.8.EL.i686.rpm kernel-smp-devel-2.6.9-78.0.8.EL.i586.rpm kernel-smp-devel-2.6.9-78.0.8.EL.i686.rpm kernel-xenU-2.6.9-78.0.8.EL.i686.rpm kernel-xenU-devel-2.6.9-78.0.8.EL.i686.rpm src: kernel-2.6.9-78.0.8.EL.src.rpm -- Karanbir Singh CentOS Project { http://www.centos.org/ } irc: z00dax, #centos @irc.freenode.net ------------------------------ _______________________________________________ CentOS-announce mailing list CentOS-announce(a)centos.org http://lists.centos.org/mailman/listinfo/centos-announce End of CentOS-announce Digest, Vol 45, Issue 13 ***********************************************

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Force close on unattended SSH/SFTP connections
by Yanagisawa, Koji 21 Nov '08

21 Nov '08

Dear CentOS people, I'm sure many have faced this before but I can't seem to figure this out. I need unattended OpenSSH and its SFTP connections to be closed after a while (say, in 10 minutes). This needs to override anything that could be done from the client side (ServerAliveInterval or keepalives a program like PuTTY can send). I kind of understand it's not always easy to know when the client side is "unattended," but I'd like to know where people drew the line and what people did in the past. ClientAliveInterval only seem to help reap connections when the client side is unreachable, so this doesn't really help. TMOUT in shell achieves what I want with SSH, but this doesn't help with SFTP. Setting net.ipv4.tcp_keepalive_probes to 0 kind of does what I want (ServerAliveInterval ruins it), and I'm not sure if that's generally accepted practice. If this could be achieved in OpenSSH, that would be great, but if it needs to be some other way I'll be glad to find out... Your insight appreciated,

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tcpdump
by Joseph L. Casale 21 Nov '08

21 Nov '08

I have an issue with only a few domains sending mail to a company's exchange server. Topology is as follows: Internet -> PIX -> logical interface / vlan -> HP switch (interface tagged into applicable vlan) -> ESXi server -> vm (ASSP/CentOS Postfix MTA) -> HP switch (out of vlan) -> physical HP server with E2003. Mail comes in, ASSP logs it, postfix logs it, queues it, attempts delivery to my exchange server and somewhere com gets mangled. I can't tell what's wrong at the postfix side, but the exchange server doesn't even log it despite the mail getting queued and released? How can I dump this interaction and more specifically sort it to see only that transaction. Server is busy, there would be a lot of data on a continuous dump. Given the topology there is room for much issues and I don't doubt the issue being from ESX forward (seen silly network issues on ESX before). Thanks for any input! jlc

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Syslog question
by Marc G. 21 Nov '08

21 Nov '08

I may be posting to the wrong list here, and in that case I apologize in advance, but is there a way to configure the standard Centos 5 syslog daemon to use more local facilities than local0 to local7? Thank you. -- m

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Can't start pand -- is the problem in /etc/rc.d/init.d/pand?
by Robert Moskowitz 21 Nov '08

21 Nov '08

I have been stepping into pand. There is nothing I can find on this list about getting pand working. There are some instructions on wifi.bluez.org that seem to be redhatish, but.... I have edited /etc/sysconfig/pand: PANDARGS='--listen --role GN --master' I have created a /etc/sysconfig/network-scripts/ifcfg-bnep0: DEVICE=bnep0 BOOTPROTO=none ONBOOT=no IPADDR=192.168.201.101 NETMASK=255.255.255.0 I run: service pand start nothing happens. I look at: /etc/rc.d/init.d/pand and see: [ -x /etc/bluetooth/pan/system-up ] && /etc/bluetooth/pan/system-up huh? My system does not have an /etc/bluetooth/pan directory. there is a /etc/sysconfig/network-scripts/ifup-bnep what am I missing here?

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Migration from VMWare to HP Blade
by Matthew Walster 21 Nov '08

21 Nov '08

Hi all, A few months ago, I migrated some of our internal servers to HP blades, as the VMWare box they were previously running on was getting too slow. However, it wasn't without it's problems, and eventually the only way I could get them to work was: Install the same version of CentOS on the blade (believed to be 5.0, but /etc/redhat-release says 5.2) Took down both servers, booting them off the SystemRescueCD, mounting all the partition on /mnt/transfer etc Ran rsync to copy all the data from one to the other - except /boot and /lib/modules Brought the blade up, and saw that it booted fine. However, a new kernel has been released and we tried rebooting... And it panicked. It seems to be LVM related, in that it can't mount /dev/root - and I've tried manually running mkinitrd to regenerate the initrd to no avail. I was just wondering if anyone had encountered similar problems, and knew of any solutions? I'm from a debian background, so am a little unused to certain aspects - when a yum upgrade installs a new kernel, where does it pull the information for boot from? A configuration stanza from within grub's menu.lst? Regards, Matthew Walster

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Discuss November 2008