[dns-operations] Reverse Lookup Problem?

Michael Monnerie michael.monnerie at it-management.at
Wed May 23 15:10:20 UTC 2007


Dear list,

I'm not sure if there's a problem. We have the IP 82.218.135.172 with a 
reverse lookup. There are 3 DNS for it, two from the ISP "kabsi.at", 
which work:

# dig +short @signal.kabsi.at -x 82.218.135.172
mail.ehrenboeck.at.
# dig +short @radio.kabsi.at -x 82.218.135.172
mail.ehrenboeck.at.

But the 3rd DNS from Ripe gives no PTR Record, just 2 NS Records. Is 
this sufficient? I think no, because postfix reported "no reverse 
lookup", that's why I ask:

# dig @ns.ripe.net -x 82.218.135.172

; <<>> DiG 9.3.2 <<>> @ns.ripe.net -x 82.218.135.172
; (2 servers found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 17656
;; flags: qr rd; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 0

;; QUESTION SECTION:
;172.135.218.82.in-addr.arpa.   IN      PTR

;; AUTHORITY SECTION:
135.218.82.in-addr.arpa. 604800 IN      NS      
radio.kabsi.at.218.82.in-addr.arpa.
135.218.82.in-addr.arpa. 604800 IN      NS      
signal.kabsi.at.218.82.in-addr.arpa.

;; Query time: 36 msec
;; SERVER: 193.0.0.193#53(193.0.0.193)
;; WHEN: Wed May 23 17:00:47 2007
;; MSG SIZE  rcvd: 95

Thanks in advance.
mfg zmi
-- 
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