Firewalls: Re: cisco packet filter firewall

Firewalls
(July 1995)

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Subject:	Re: cisco packet filter firewall
From:	Adam Safier <asafier @ explorer . csc . com>
Date:	Thu, 13 Jul 1995 17:30:54 -0400 (EDT)
To:	Brent Chapman <Brent @ GreatCircle . COM>
Cc:	David Madole/TMG/CSC <David_Madole/TMG/CSC . CSC @ cscmail . csc . com>, firewalls <firewalls @ greatcircle . com>, Julie Ann Connary <73203 . 2236 @ compuserve . com>
In-reply-to:	<v02120cb2ac22910cc877 @ [198 . 102 . 244 . 36]>

> of BIND, I don't think; I believe (though my info may be out of date) that
> IBM AIX systems always use TCP connections for DNS, even for simple
> resolver queries that most other UNIX systems would use UDP for.

I had a sniffer on an AIX system 3.2.5 and saw it only use UDP.  allowing 
only port 53 through the router worked for us.

Adam

References:

Re: cisco packet filter firewall
From: Brent @ GreatCircle . COM (Brent Chapman)

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