Problem With NFS and iptables

Unger, John W
Sat, 21 Jul 2007 02:28:40 -0000

I have a setup where I am running on a machine with Red Hat Enterprise Linux
Release 3. I have a userland program that is attempting to attach to libipq.
When I issue the ''iptables -A OUTPUT -t mangle -j QUEUE''
command to attach, the machine hangs. The only way to unhang the machine is to
do a hard restart.

All the machine''s filesystems are connected to an NFS server, including
the /usr filesystem. So the OS is also running from the NFS server.

The userland program works correctly on the NFS server and on other machines
that are not NFS clients. Is there some way that I can configure iptables to
allow the NFS commands to be performed while the ''-j QUEUE''
command is executing? I believe that is where the problem is occurring because
the hang occurs when that command is executing.

Does anyone else have a setup similar to this one? If so, could you share your
configuration information?

Any help would be greatly appreciated.

John Unger


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