DNS for Win2K (was: Win2000 "junk" in DNS)

[Barry Margolin]

In article <Pine.LNX.4.10.10001071453230.20579-100000 at maestas.idc.dhs.org>,
Tim Maestas  <tmaestas at idc.dhs.org> wrote:
>
>> I'm completely in favor of hearing more about this.  What I'm assuming
>> from this thread is that MS Active Directory is unable to work without
>> using underscores (_).
>
>I've just been reading the Windows 2000 DNS whitepaper from microsoft.  A
>question for all:  Is an underscore (_) valid in SRV records?  Because
>this is where it is extensively used by Win2k.  Wink2k domain controllers
>will register several SRV records, all containing underscores.  

Underscores are valid everywhere except hostnames.  SRV records contain a
combination of service info and a hostname, and underscores are valid in
the service info components.  In fact, the specification of SRV records was
changed to use underscores in those components precisely to make sure that
they won't collide with hostnames.  See draft-ietf-dnsind-rfc2052bis-05.txt.

-- 
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.