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From: NU021172@VM1.NODAK.EDU (Marty Hoag)
Newsgroups: comp.protocols.tcp-ip.domains
Subject: Re: Finding hostnames of a domain
Message-ID: <9104191818.AA24424@ucbvax.Berkeley.EDU>
Date: 18 Apr 91 13:18:08 GMT
References: <Mike.Marshall@hubcap.clemson.edu>
Sender: daemon@ucbvax.BERKELEY.EDU
Distribution: inet
Organization: North Dakota Higher Education Computer Network
Lines: 56

On Wed, 17 Apr 91 09:09:21 -0400 you said:
>
>You can usually find out with ls if you ask the right nameserver:
...
>> set q=a
>> server arizona.edu
>Default Server:  arizona.edu
>Address:  128.196.128.233
>
>> ls arizona.edu
>[arizona.edu]
>Host or domain name            Internet address
> arizona                        server = Arizona.EDU
> Arizona                        128.196.128.233
> Arizona                        128.196.128.234
> arizona                        server = CS.Arizona.EDU
> CS                             192.12.69.5
> arizona                        server = pendragon.cs.purdue.edu
...

   Is it a bug or a feature that this list is almost useless unless
you do a      set debug    .    Note on the sample above that the
"Host or domain name" field is less than illuminating in most cases!
The problem is that nslookup only lists the first element of the name,
no matter what the domain is!  The system I normally use is not unix
but I just stumbled across this.  I didn't see it listed in the man
pages.

   Here is the same request with "set debug" on.  Note that instead of
just "pendragon" which you would have gotten without debug, you see
that the entry is really not an arizona entity.

> set debug
> ls arizona.edu
res_mkquery(0, arizona.edu, 1, 252)
&arizona.edua
Host or domain name            Internet address
 arizona.edu                    server = Arizona.EDU                    86400
 Arizona.EDU                    128.196.128.233                 86400
 Arizona.EDU                    128.196.128.234                 86400
 arizona.edu                    server = CS.Arizona.EDU                 86400
 CS.Arizona.EDU                 192.12.69.5                     86400
 arizona.edu                    server = pendragon.cs.purdue.edu        86400
 pendragon.cs.purdue.edu        128.10.2.5                      120034
 arizona.edu                    128.196.128.233                 86400
 arizona.edu                    128.196.128.234                 86400
 wmorgan.peds-pulm.arizona.edu  128.196.164.8                   86400
 sec1.peds-pulm.arizona.edu     128.196.164.6                   86400

-----------
Marty Hoag
ND Higher Education Computer Network    US Mail: NDSU Computer Center
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