RR for win2k

[Stephens, Bill]

	Windows 2000 DNS allows the use of the "_" character, and uses it
for its dynamic SRV records.  Some clients will not allow you to query an
invalid name.  For example nslookup under OS/2 (I know dead os) will not
lookup invalid hostnames, unless you add a norfc1123 record in the resolver
file.  Also, he has stated that he used the warn statement in his DNS, this
should allow his DNS to host the invalid names.

	-Bill Stephens




	Joseph S D Yao <jsdy at cospo.osis.gov>
	04/19/2000 09:11 PM
	To:	Tim Maestas <tmaestas at idc.dhs.org>@SMTP at Exchange
	cc:	Art Houle <houle at mailer.fsu.edu>@SMTP at Exchange,
bind-users at isc.org@SMTP at Exchange 
	Subject:	Re: RR for win2k

	On Wed, Apr 19, 2000 at 06:54:23PM -0700, Tim Maestas wrote:
	> This is a limitation of nslookup in interactive mode.  It doesn't
like
	> underscores.
	> 
	> -Tim

	Incorrect.  'Nslookup' doesn't care.

	Underscores are illegal in host names.  If the original questioner
	checks his log files, I suspect that he will find that 'named' will
not
	accept this name.  But even more so:

	> On Wed, 19 Apr 2000, Art Houle wrote:
	> > $origin xyz.tld
	> > _sites    IN    A    global-catalog.xyz.tld.

	"A" records must have IP addresses on the right hand side.  If you
are
	using the name [without underscores] as an alias for another name,
this
	should be a "CNAME" record.

	> > A nslookup query responds with 'can't find _sites.xyz.tld:
Non-existent
	> > hosts/domain',  but it works if I remove the underbar.  Is there
a config
	> > option that fixes this?

	Yes, there is.  But it can't force all other name servers to accept
	this illegal name.

	The option is:
	       [ check-names ( master | slave | response ) ( warn | fail |
ignore); ]
	e.g., if you say:

		check-names master warn;

	then it will be accepted but warn you of the error of your ways.

	The defaults are:
		check-names master fail;
		check-names slave warn;
		check-names response ignore;

	-- 
	Joe Yao				jsdy at cospo.osis.gov - Joseph S. D.
Yao
	COSPO/OSIS Computer Support
EMT-B
	
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