From mboxrd@z Thu Jan  1 00:00:00 1970
From: Aleksandar Milivojevic <amilivojevic@pbl.ca>
Subject: Re: Fwd: Re: Help with ICMP Ruls
Date: Thu, 15 Jul 2004 15:04:45 -0500
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Real Cucumber wrote:
> I do have a state rule already for allowing any
> established,related connections.
> 
> So should I add another one such as:
> 
> iptables -A FORWARD -p icmp -m state --state RELATED
> -j ACCEPT
> 
> The current ruleset is attached (I've only excluded
> the variables and logging sections of it).
> 
> # Allow previously initiated and accepted connections
> # to bypass firewall tests (state matching)
> iptables -A INPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
> iptables -A OUTPUT -m state --state ESTABLISHED,RELATED -j ACCEPT
> iptables -A FORWARD -m state --state ESTABLISHED,RELATED -j ACCEPT

If you have this three generic rules, you don't need separate rule just 
for ICMP.  The generic rule will match all IP protocols (tcp, udp, and 
icmp).

-- 
Aleksandar Milivojevic <amilivojevic@pbl.ca>    Pollard Banknote Limited
Systems Administrator                           1499 Buffalo Place
Tel: (204) 474-2323 ext 276                     Winnipeg, MB  R3T 1L7