Assistance with reverse lookup zone

Chris Buxton cbuxton at
Fri Jun 12 19:04:05 UTC 2009

On Jun 12, 2009, at 9:37 AM, Frank Pikelner wrote:
> Thank you for everyone's assistance. I have updated the zone files.
> After the updates and restarting BIND, I run "dig +trace ptr
>" and the result stops just prior to  
> getting to
> my DNS server and correctly resolving the name of the IP address. I'm
> new to dig and do not know whether this is correct for an RFC2317 zone
> delegation or whether the trace should be completing at my servers and
> resolving the name.

This is normal. "dig +trace" does not follow the dangling CNAME record  
that it finds - you'll see it in the last part of the trace. Just re- 
run the trace with the altered name shown on the RHS of the CNAME  
record - "" - or query with that name  
against the indicated name servers directly (without using +trace).

$ dig PTR +norec

; <<>> DiG 9.4.3-P1 <<>> PTR +norec
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 7189
;; flags: qr aa; QUERY: 1, ANSWER: 1, AUTHORITY: 3, ADDITIONAL: 0



;; AUTHORITY SECTION: 86400 IN	NS 86400 IN	NS 86400 IN	NS

;; Query time: 118 msec
;; WHEN: Fri Jun 12 12:03:34 2009
;; MSG SIZE  rcvd: 161

Chris Buxton
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