[tlug] iptables rules disappearing ...

[Jean-Christian Imbeault <jc@example.com>]

I'm finding that I can set iptables rules but that after about 30 
seconds they disappear and I am left with three empty 
INPUT/OUTPUT/FORWARD tables ...

# iptables -n -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0
ACCEPT     tcp  --  0.0.0.0/0            0.0.0.0/0          tcp dpt:53
ACCEPT     udp  --  0.0.0.0/0            0.0.0.0/0          udp dpt:53

Chain FORWARD (policy DROP)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0

After about 30 seconds ....

# iptables -n -L
Chain INPUT (policy ACCEPT)
target     prot opt source               destination

Chain FORWARD (policy DROP)
target     prot opt source               destination

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination
[root@example.com etc]#


Can anyone hazard a guess as to what is making my rules disappear like 
that? I've even tried writting the rules to file with iptables-save and 
then rebooting my machine. The rules show up fine after I reboot but 
they also disappear after about 30 seconds.

Maybe I have installed iptables wrong or have some remnants of Red Hat 
specific iptables stuff left lying around that is coming back to haunt me?

Any guesses?

Jc