Hi Steve,

I use this to remove all rules:

iptables -P INPUT ACCEPT
iptables -P FORWARD ACCEPT
iptables -P OUTPUT ACCEPT
iptables -t nat -F
iptables -t mangle -F
iptables -F
iptables -X

I can't speak for the provenance, but afterwards
iptables -n -L, shows ACCEPT for INPUT, OUTPUT and FORWARD,
with no other rules.


--
Joel Roth