Date: Sat, 30 Oct 1999 18:23:28 -0700 (PDT) From: Dan Busarow <dan@dpcsys.com> To: John <papalia@UDel.Edu> Cc: freebsd-questions@FreeBSD.ORG Subject: Re: Reverse DNS lookup Message-ID: <Pine.BSF.3.96.991030181837.24150A-100000@java.dpcsys.com> In-Reply-To: <Pine.SOL.4.05.9910292246480.14853-100000@copland.udel.edu>
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On Fri, 29 Oct 1999, John wrote:
> > > The question - is there something that needs to be configured some place
> > > to enable reverse DNS? Odds are I need to provide additional information
> > > off my system - just let me know what it is :)
> >
> > Send the output of
> >
> > $ nslookup 206.16.184.7
>
> Output is actually a timeout after about 60 seconds or so:
>
> merlin# nslookup 206.16.184.7
> Server: copland.udel.edu
> Address: 128.175.xx.xx
>
> *** Request to copland.udel.edu timed-out
Looks like your uni is having network problems, I sent you a copy
directly and got a sendmail warning
----- The following addresses had transient non-fatal errors -----
<papalia@UDel.Edu>
----- Transcript of session follows -----
<papalia@UDel.Edu>... Deferred: Name server: udel.edu.: host name lookup
failure
Warning: message still undelivered after 4 hours
Will keep trying until message is 5 days old
> I tried instead an IP I've actually been having trouble resolving:
>
> merlin# nslookup 63.224.53.3
> Server: copland.udel.edu
> Address: 128.175.xx.xx
>
> *** copland.udel.edu can't find 63.224.53.3: Non-existent host/domain
That's cause there is no reverse for that IP. It's from a /25 subnet
and US West probably doesn't delegate less than a /24 for in-addr.arpa
Dan
--
Dan Busarow 949 443 4172
Dana Point Communications, Inc. dan@dpcsys.com
Dana Point, California 83 09 EF 59 E0 11 89 B4 8D 09 DB FD E1 DD 0C 82
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