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Re: Valid charecter set in DNS

Danny Mayer <mayer@gis.net> Thu, 18 April 2002 07:44 UTC

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Date: Wed, 17 Apr 2002 20:38:17 -0500
To: dhiraj Dhiraj <gdhiraj@novell.com>, dnsop@cafax.se, namedroppers@ops.ietf.org
From: Danny Mayer <mayer@gis.net>
Subject: Re: Valid charecter set in DNS
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At 10:24 PM 4/16/02, dhiraj Dhiraj wrote:
>Hi all,
>                I have a question regarding the valid character set in
>DNS. I have seen RFC 1034, 1123, 2181. It seems RFC 2181 removes the
>restrictions of RFC 1034,1123 which says that only  letters, digits, and
>hyphen are allowed. I wanted to know whether this interpretation is
>correct or not and if it is, then what are the applications that require
>other characters? I am aware of that underscores are required bcoz of
>the SRV RR.

This is incorrect.  Microsoft requires underscores it for its Active Directory
information. It's not part of any RFC for SRV Records.

         Danny

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