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Date:      Mon, 22 Apr 2002 06:24:01 -0500
From:      Len Conrad <LConrad@Go2France.com>
To:        freebsd-security@freebsd.org
Subject:   Re: DNS Question
Message-ID:  <5.1.0.14.2.20020422062026.05613ec0@mail.Go2France.com>
In-Reply-To: <3CC3C250.28097.2D5EA4@localhost>

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>ipfw allows queries to ports 53 and 1024 from any IP inside the private
>network (internal interface) and only certain ISP IPs on the external
>interface.

53 udp/tcp is all you need on ingress, plus ssh.

On egress, bind will query via udp/tcp on port > 1023.

 > I need to open those ports to any IP on the external interface.

>Is there any security concerns I should have if I do this ?

Run the latest version of bind, and check for known compromises in it on 
the isc.org site.

Len


http://MenAndMice.com/DNS-training
http://BIND8NT.MEIway.com : ISC BIND for NT4 & W2K
http://IMGate.MEIway.com  : Build free, hi-perf, anti-abuse mail gateways


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