Jack,

Do you have any ip_conntrack modules in /etc/sysconfig/iptables-config on
the IPTABLES_MODULES= line?

-- Robin

On Fri, Aug 29, 2008 at 1:47 PM, Jack Neely <[EMAIL PROTECTED]> wrote:

> Folks,
>
> Over the last few months I've seen some repeated kernel panics on some
> of our RHEL 5 servers that provide a webmail service.  These machines
> have a script that monitors logs to do some basic self-protection by
> altering the iptables firewall rules.  However, at some point, running
> the iptables command generates a kernel panic in tcp_tso_segment (I
> believe) and the machine locks hard.  The only bits of the kernel panic
> I can catch are what's left on the screen:
>
>    
> http://anduril.unity.ncsu.edu/~slack/panic-20080828.jpg<http://anduril.unity.ncsu.edu/%7Eslack/panic-20080828.jpg>
>
> These are running fairly recent kernels: 2.6.18-92.1.10.el5,
> 2.6.18-53.1.14.el, 2.6.18-92.1.6.el5, etc.  Several different hardware
> types.
>
> Any ideas what's happening?
>
> Jack Neely
> --
> Jack Neely <[EMAIL PROTECTED]>
> Linux Czar, OIT Campus Linux Services
> Office of Information Technology, NC State University
> GPG Fingerprint: 1917 5AC1 E828 9337 7AA4  EA6B 213B 765F 3B6A 5B89
>
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