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Re: reverse dns

From: Len Conrad
Date: Tuesday, July 29, 2003
Time: 10:16:15 am


>unless I call on one of my name servers directly, what do I need to do to
>make this work correctly?


ATT is following RFC2317 to delegate a sub-Class C reverse zone.

# dig -x 12.33.161.78

; <<>> DiG 8.3 <<>> -x
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 4, ADDITIONAL: 4
;; QUERY SECTION:
;; 78.161.33.12.in-addr.arpa, type = ANY, class = IN

;; ANSWER SECTION:
78.161.33.12.in-addr.arpa. 23h3m20s IN CNAME 78.64/28.161.33.12.in-addr.arpa.

Set up a reverse zone with the name (don't worry about the "illegal" slash
symbol, it's RFC):

64/28.161.33.12.in-addr.arpa.

and in that zone file, put PTR records that match ATT's CNAME RDATA fields:

65.64/28.161.33.12.in-addr.arpa. ....
.
.
.
78.64/28.161.33.12.in-addr.arpa. PTR knightprinting.com.
79......


Len




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