From: Vladislav Kurz <vladislav.kurz@webstep.net>
To: netfilter@vger.kernel.org
Subject: Re: IP Tables and DNS
Date: Fri, 12 Sep 2008 09:42:11 +0200 [thread overview]
Message-ID: <200809120942.11190.vladislav.kurz@webstep.net> (raw)
In-Reply-To: <u1qic49dl8q0020pbblh2o4pdm3gi5nrfd@4ax.com>
On Thursday 11 of September 2008, Andrew Schulman wrote:
> > If so, do I need any rules on the external interface other than the
> > rules to allow the outgoing query (tcp and udp) and an
> > "established,related" rule?
>
> Nope. "Established" covers direct replies to UDP packets (i.e. DNS
> requests) that you've already sent out, so that's probably all you need in
> this case. "Related" covers new connections related to the first one, such
> as FTP data connections triggered by FTP control traffic. I don't think
> there are any "related" criteria that apply to DNS.
What about some ICMP (port|host) unreachable packet when you try to query a
broken DNS server? Isn't that a RELATED packet?
--
Regards
Vladislav Kurz
next prev parent reply other threads:[~2008-09-12 7:42 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-11 18:09 IP Tables and DNS David Doster
2008-09-11 18:53 ` Andrew Schulman
2008-09-12 7:42 ` Vladislav Kurz [this message]
2008-09-12 14:13 ` Andrew Schulman
-- strict thread matches above, loose matches on Subject: below --
2008-09-11 22:02 David Doster
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