Re: [squid-users] Squid and Firewall on Gateway

From: Matus UHLAR - fantomas <[email protected]>
Date: Mon, 20 Dec 2004 11:46:17 +0100

On 17.12 09:20, Chris Robertson wrote:
> Your firewall rules seem to be preventing your gateway from doing DNS
> lookups...
>
> Add a rule like:
>
> ## DNS Lookups
> iptables -A INPUT -p udp -i eth1 --sport 53 -d 192.168.192.70 -j ACCEPT

allowing packets from port 53 is not good idea. allowing ESTABLISHED
connections using --state is much, much better.

> iptables -A OUTPUT -p udp -o eth1 --dport 53 -s 192.168.192.70 -j ACCEPT

I don't think he has blocked outgoing data.

so, instead of two rules abuve, the simple rule:

iptables -A INPUT -m state --state ESTABLISHED -j ALLOW

should be just enough. You need to have 2.4 and later kernel and the
needed modules loaded.

-- 
Matus UHLAR - fantomas, [email protected] ; http://www.fantomas.sk/
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Received on Mon Dec 20 2004 - 03:46:20 MST

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