reverse lookup for single address

Ladislav Vobr lvobr at ies.etisalat.ae
Fri Sep 10 23:38:48 UTC 2004


when I try dig 80.56.34.12.in-addr.arpa @cmtu.mt.ns.els-gms.att.net.
which is the authority for 34.12.in-addr.arpa, you can see below they
are using RFC2317 for classless reverse delegation.
80.56.34.12.in-addr.arpa. is a CNAME to 80.80/29.56.34.12.in-addr.arpa.
and the authority for this is add-inc.com. and ns1-norlight.net. Are
these authorities correct or you are the owner of that block? I suggest
you talk to guys at cmtu.mt.ns.els-gms.att.net. or add-inc.com if it is
not you yourself :-)

BTW: Just now I noticed you are using faked ip, so how can you expect
real help? maybe you will receive fake help too :-) If you have just
subclass C assigned you have to follow rfc2317 and can not setup reverse
zone for whole class, maybe this is your problem.


# dig 80.56.34.12.in-addr.arpa @12.127.16.69

; <<>> DiG 9.2.2 <<>> 80.56.34.12.in-addr.arpa @12.127.16.69
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37366
;; flags: qr rd; QUERY: 1, ANSWER: 1, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;80.56.34.12.in-addr.arpa.      IN      A

;; ANSWER SECTION:
80.56.34.12.in-addr.arpa. 83000 IN      CNAME
80.80/29.56.34.12.in-addr.arpa.

;; AUTHORITY SECTION:
80/29.56.34.12.in-addr.arpa. 83000 IN   NS      add-inc.com.
80/29.56.34.12.in-addr.arpa. 83000 IN   NS      ns1-norlight.net.


Ladislav

Tony Tung wrote:
> Hi,
> 
> But since 12.34.56.80 does not belong to me, is there a way I can=20
> redirect the request up to my ISP?
> 
> Thanks,
> Tony
> 
> On Sep 9, 2004, at 7:37 AM, Willy LR wrote:
> 
> 
>>Hi
>>
>>Seems like you have no PTR record for 12.34.56.80
>>
>>Just add it to your reverse zone file
>>
>>You can also automatically generate PTR records :
>>
>>$GENERATE 1-80 $.56.34.12.in-addr-arpa  PTR host$.yourdomain.org
>>
>>Hope that helps
>>
>>Regards
>>
>>
>>>De=A0: Tony Tung <tonytung at csua.berkeley.edu>
>>>Soci=E9t=E9=A0: ...
>>>Groupes de discussion=A0: comp.protocols.dns.bind
>>>Date=A0: Wed, 8 Sep 2004 19:17:32 +0000 (UTC)
>>>=C0=A0: comp-protocols-dns-bind at isc.org
>>>Objet=A0: reverse lookup for single address
>>>
>>>Hi,
>>>
>>>I'm trying to get my name server on my server to answer reverse=20
>>>lookup.
>>>That is, my server lives at 12.34.56.78 (address faked), but that is=20=
> 
> 
>>>the
>>>only address I have.  I want to be able to do this from a remote=20
>>>server:
>>>
>>>nslookup 12.34.56.78 12.34.56.78
>>>
>>>and get a correct resolution.  I've managed to do that much. =20
>>>However, I
>>>can no longer reverse-resolve other addresses in the same subnet from=20=
> 
> 
>>>my
>>>own server, i.e., I cannot reverse-map 12.34.56.80.
>>>
>>>Can someone give me some tips?  This is what I have in my named.conf:
>>>
>>>zone "56.34.12.in-addr.arpa" IN {
>>>      type slave;
>>>      file "master/pub.rev";
>>>      masters {
>>>          64.81.79.2;
>>>          216.231.41.2;
>>>      };
>>>};
>>>
>>>and in pub.rev:
>>>
>>>$ORIGIN 56.34.12.in-addr.arpa.
>>>$TTL    3600
>>>@       IN      SOA
>>>myserver.org. root.myserver.org.  (
>>>                              20030406        ; Serial
>>>                              3600    ; Refresh
>>>                              900     ; Retry
>>>                              3600000 ; Expire
>>>                              3600 )  ; Minimum
>>>      IN      NS      myserver.org.
>>>78      IN      PTR     myserver.org.
>>>
>>>
>>>Thanks!
>>>Tony
>>>
>>>
>>
>>
> 
> 



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