Bind 9 Reverse Lookup

[Ruben I Safir - Brooklyn Linux Solutions CEO]

Barry

Thank you for ALL your help.

I really apreciate it.

I just wanted to tell you, for future reference since you answer a ton of
these questions, that in this case, I didn't have a dot after the $origin
variable.

And for what it's worth, the O'reilly Bind DNS book doesn't have the
in-addr.arpa added to the PTR records.

Ruben

On Thu, 11 Jan 2001 13:28:56 Barry Margolin wrote:
> In article <93kkkb$f0k at pub3.rc.vix.com>,
> Ruben I Safir - Brooklyn Linux Solutions CEO  <ruben at mrbrklyn.com> wrote:
> >
> >
> >
> > - This is the output from nslookup -d
> >
> >I don't see anything to cuase the server not to be seen
> 
> I do.  The server responded to reverse lookup with an NXDOMAIN answer,
> meaning that it can't find a PTR record for its own address.  Don't you see
> that right after the first "Got answer:" line?
> 
> I did an AXFR of the zone, and I saw the following record:
> 
> 114.229.112.216.in-addr.arpa  IN PTR  mail.rm-cpa.com.
> 
> Notice the missing "." after "arpa".  Since the name doesn't end in ".",
> it's not fully qualified, so the $ORIGIN is appended.  Thus, the above
> record is equivalent to:
> 
> 114.229.112.216.in-addr.arpa.229.112.216.in-addr.arpa. IN PTR 
mail.rm-cpa.com.
> 
> >On Thu, 11 Jan 2001 10:38:41 Ruben I Safir wrote:
> >nslookup mail.rm-cpa.com
> >
> >
> >;; res_nmkquery(QUERY, 114.229.112.216.in-addr.arpa, IN, PTR)
> >------------
> >Got answer:
> >    HEADER:
> >	opcode = QUERY, id = 16909, rcode = NXDOMAIN
> >	header flags:  response, auth. answer, want recursion, recursion
> >avail., authentic data
> >	questions = 1,  answers = 0,  authority records = 1,  additional =
0
> >
> >    QUESTIONS:
> >	114.229.112.216.in-addr.arpa, type = PTR, class = IN
> >    AUTHORITY RECORDS:
> >    ->  229.112.216.in-addr.arpa
> >	ttl = 86400 (1D)
> >	origin = mail.rm-cpa.com
> >	mail addr = root.rm-cpa.com
> >	serial = 5
> >	refresh = 43200 (12H)
> >	retry   = 3600 (1H)
> >	expire  = 2419200 (4W)
> >	minimum ttl = 86400 (1D)
> 
> -- 
> Barry Margolin, barmar at genuity.net
> Genuity, 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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