Underscore Character

kevinm at crt.com kevinm at crt.com
Mon Nov 8 19:55:18 UTC 1999


Thanks for the info.  That clears it up.

Kevin Martin
Bank of America
Firewall/DNS/SMTP/Network Admin.
kevinm at crt.com


-----Original Message-----
From: Barry Margolin [mailto:barmar at bbnplanet.com]
Sent: Monday, November 08, 1999 12:39 PM
To: comp-protocols-dns-bind at moderators.uu.net
Subject: Re: Underscore Character


In article
<F931488C3634D11180D700A02461E24501E98B30 at chitmd03.nt.il.nbgfn.com>,
 <kevinm at crt.com> wrote:
>I've got another quick question about the "_" character.  I was in a two
day
>conference last week that showed the "_" being used in the SRV RR.  This
>appears to be the default naming for SRV RR's.  Is this true and does this
>mean that the "_" is ONLY valid for SRV RR's?

Underscores are disallowed in hostnames.  They're allowed in other
contexts.  The specification of SRV records chose to use underscores
precisely so that they would never conflict with hostnames.

-- 
Barry Margolin, barmar at bbnplanet.com
GTE Internetworking, Powered by BBN, Burlington, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
Please DON'T copy followups to me -- I'll assume it wasn't posted to the
group.


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