From mboxrd@z Thu Jan  1 00:00:00 1970
From: "Dan Searle" <dan@intrago.co.uk>
Subject: Re: Tightening up outgoing traffic
Date: Tue, 15 Oct 2002 15:32:13 +0100
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Hi,

>
> I keep getting "domainname can not be found.  Please check the name and
> try again" from my browser.  This only happens for new web sites (i.e.,
> Yahoo works fine).  As this seems somewhat like a DNS issue, I tried
> adding this:
>

That'll be a DNS problem ;-)

> iptables -A OUTPUT -p tcp --destination-port nameserver -j ACCEPT
>
> but it didn't work.  Any ideas?  Thanks.

iptables -A OUTPUT -p tcp --dport domain -j ACCEPT
iptables -A OUTPUT -p udp --dport domain -j ACCEPT

You want to use the service name "domain", not "nameserver", also I think
domain lookups use the udp protocol also. (Don't quote me on that one :-)

Dan...