Re: Fwd: Re: Help with ICMP Ruls

[Antony Stone <Antony@Soft-Solutions.co.uk>]

On Thursday 15 July 2004 8:55 pm, Real Cucumber wrote:

> I do have a state rule already for allowing any
> established,related connections.

In that case you are already allowing ICMP :)

> So should I add another one such as:
>
> iptables -A FORWARD -p icmp -m state --state RELATED
> -j ACCEPT

No.   ICMP messages which are RELATED to the existing SSH connections will get 
matched by the final rule in this section of your rules:

# 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

Just out of interest, why do you have the first two of these rules, if you 
have no INPUT or OUTPUT traffic?

Regards,

Antony.

-- 
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