From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Patrick Ahler" <patrick@vikus.com>
Subject: Forwarding Problems
Date: Thu, 6 Mar 2003 11:56:18 -0500
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To: netfilter EMAIL <netfilter@lists.netfilter.org>

I have iptables FORWARD chain working except for one minor detail... after I
set all the ACCEPT rules, I want to set a drop rule/policy to the FORWARD
CHAIN as well, thus dropping all the packets I haven't accepted. The problem
is, if I use

iptables -A FORWARD -j DROP
or
iptables -P FORWARD DROP

they will drop all packets including the ones I already ACCEPTed.

example (want to allow all incoming and outgoing www traffic):
iptables -A FORWARD -p tcp -d 192.168.1.0/24 --dport 80 -j ACCEPT
iptables -A FORWARD -p tcp -d 192.168.1.0/24 --sport 80 -j ACCEPT
iptables -A FORWARD -p tcp -s 192.168.1.0/24 --dport 80 -j ACCEPT
iptables -A FORWARD -p tcp -s 192.168.1.0/24 --sport 80 -j ACCEPT
iptables -A FORWARD -j DROP

Any help is greatly appreciated