Re: Fwd: Re: Help with ICMP Ruls

[Real Cucumber <monkcucumber@yahoo.com>]

I allow myself restricted by IP to connect in for SSH
on the LAN interface on the fedora box.

However, no Input/Output is alowed on the WAN
interface though.

Sorry I guess I lied/misled by saying "NO"
input/output - as I was just referring to the WAN.




--- Antony Stone <Antony@Soft-Solutions.co.uk> wrote:
> 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.
> 
> -- 
> Microsoft may sell more software than any other
> company, but McDonald's sell 
> more burgers than any other company, and I think the
> other similarities are 
> obvious...
> 
>                                                     
> Please reply to the list;
>                                                     
>       please don't CC me.
> 
> 
> 



	
		
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