Hi, I'm trying to set up iptables o

[Devin]

Hi, I'm trying to set up iptables on RH7.2
It seems to be partially working because it's doing masquerading (machines on the internal network can get out)
but if I try to do anything with iptables ie:
iptables -L
iptables -A <stuff here>
etc.
I get:

/lib/modules/2.4.7-10/kernel/net/ipv4/netfilter/ip_tables.o: init_module: Device or resource busy
Hint: insmod errors can be caused by incorrect module parameters, including invalid IO or IRQ parameters
/lib/modules/2.4.7-10/kernel/net/ipv4/netfilter/ip_tables.o: insmod /lib/modules/2.4.7-10/kernel/net/ipv4/netfilter/ip_tables.o failed
/lib/modules/2.4.7-10/kernel/net/ipv4/netfilter/ip_tables.o: insmod ip_tables failed
iptables v1.2.5: can't initialize iptables table `filter': iptables who? (do you need to insmod?)
Perhaps iptables or your kernel needs to be upgraded.

I'm using kernel version 2.4.7-10
and iptables version 1.2.5 (I upgraded from the default of 1.2.3)

Any ideas?