insmod ip_conntrack returns BUSY error

[Nigel Morse]

redhat installs and configures ipchains by default - and from your mail you
have the ipchains module loaded. Iptables can't run at the same time. First
run

chkconfig ipchains off

and reboot (actually you could probably use service ipchains stop to save
the reboot- but I can't verify this...)

You can then set up iptables.

Extra hint: Once you have set up some rules (i keep a script for this) you
can run 
iptables-save > /etc/sysconfig/iptables  

and then this file gets put into iptables-restore when you next boot.