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To: dnsop@cafax.se
From: Bruce Campbell <bruce.campbell@ripe.net>
Date: Fri, 21 Feb 2003 00:19:12 +0100 (CET)
In-Reply-To: <1045767795.1155.135.camel@red>
Sender: owner-dnsop@cafax.se
Subject: Re: Why one port?

On 20 Feb 2003, Ed Sawicki wrote:

> I'm wondering why there is only one UDP port assigned to the DNS
> protocol? It prevents us from using both an iterative name
> server and a recursive name server/cache on the same computer
> when only one IP address is available.

It does not prevent you from doing so.  Most decent DNS servers allow you
to be authoritative to one set of IP addresses, and recursive to another
set of IP addresses.

( Whether information from the recursive side leaks into the authoritative
  side is another issue )

--==--
Bruce.

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