From: Wichert Akkerman <wichert@wiggy.net>
To: Adam Denenberg <adam@dberg.org>
Cc: Jan Engelhardt <jengelh@linux01.gwdg.de>, linux-kernel@vger.kernel.org
Subject: Re: bind() udp behavior 2.6.8.1
Date: Wed, 15 Dec 2004 01:43:04 +0100 [thread overview]
Message-ID: <20041215004303.GC6623@wiggy.net> (raw)
In-Reply-To: <1103045881.10965.48.camel@sucka>
Previously Adam Denenberg wrote:
> i am aware that UDP is connectionless. However in terms of a firewall
> this is different. It _must_ keep a state table of some sorts otherwise
> high port outbound connections destined for a DNS server will never be
> let back in b/c the firewall will just say "Why is this dns server
> making a udp connection to port 32768 on this client?". Keeping a state
> table allows this behavior thru the firewall as it should.
Just allow outgoing udp traffic from source port 53 from your DNS
server and you're done.
Wichert.
--
Wichert Akkerman <wichert@wiggy.net> It is simple to make things.
http://www.wiggy.net/ It is hard to make things simple.
next prev parent reply other threads:[~2004-12-15 0:48 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2004-12-14 15:38 bind() udp behavior 2.6.8.1 Adam Denenberg
2004-12-14 16:04 ` Jan Engelhardt
2004-12-14 16:42 ` Adam Denenberg
2004-12-14 16:44 ` Jan Engelhardt
2004-12-14 17:01 ` Adam Denenberg
2004-12-14 17:10 ` Jan Engelhardt
2004-12-14 17:38 ` Adam Denenberg
2004-12-14 17:49 ` Jan Engelhardt
2004-12-15 0:43 ` Wichert Akkerman [this message]
2004-12-16 5:49 ` Willy Tarreau
2004-12-14 22:07 ` Kyle Moffett
2004-12-15 2:23 ` Adam Denenberg
2004-12-15 3:19 ` Kyle Moffett
2004-12-15 14:16 ` Adam Denenberg
2004-12-15 19:07 ` Jan Harkes
2004-12-15 19:22 ` Adam Denenberg
2004-12-15 20:06 ` linux-os
2004-12-15 20:19 ` Adam Denenberg
2004-12-15 20:45 ` Doug McNaught
2004-12-15 20:48 ` Adam Denenberg
2004-12-15 20:57 ` Doug McNaught
2004-12-16 6:10 ` Willy Tarreau
2004-12-16 14:24 ` Adam Denenberg
2004-12-16 14:51 ` Jan Harkes
2004-12-16 15:00 ` Adam Denenberg
2004-12-16 6:03 ` Willy Tarreau
2004-12-16 14:17 ` Adam Denenberg
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