iptables module not loading. RHEL 4.

[Chris Henderson]

Red Hat Enterprise Linux AS release 4 (Nahant Update 6) 2.6.9-67.ELsmp #1 SMP

I don't know what the trigger was, but I lost both NICs when I
restarted a server (there was no patching or anything!). The fix was
to put the following in /etc/rc.local file:

insmod /lib/modules/2.6.9-67.ELsmp/kernel/drivers/net/bnx2.ko
insmod /lib/modules/2.6.9-67.ELsmp/kernel/drivers/net/e1000/e1000.ko

but now I get error in /var/log/messages...

modprobe: FATAL: Module ip_tables not found.

Which module do I need to load in order to fix this?

Thanks.