Reverse DNS on a /25 called 127-1?

[Barry Margolin]

In article <a9n04u$mm4 at pub3.rc.vix.com>,
Yann Sommer <dump at soultwins.com> wrote:
>18-Apr-2002 17:19:37.675 queries:
>XX+/66.221.101.10/1.101.221.66.in-addr.arpa/PTR/IN
>18-Apr-2002 17:19:37.678 lame-servers: Lame server on
>'1.101.221.66.in-addr.arpa' (in '101.221.66.IN-ADDR.ARPA'?):
>[216.221.162.81].53 'NS.CIHOST.COM'
>18-Apr-2002 17:19:37.688 lame-servers: Lame server on
>'1.101.221.66.in-addr.arpa' (in '101.221.66.IN-ADDR.ARPA'?):
>[216.221.162.111].53 'NS2.CIHOST.COM'
>*** localhost.soultwins.com can't find 66.221.101.1: Server failed
>18-Apr-2002 17:20:15.253 default: ns_forw:
>query(1.101.221.66.in-addr.arpa) All possible A RR's lame
>
>I tried numerous different ways, including calling the zone
>0/25.101.221.66.in-addr.arpa which yielded the same results. Only if I
>would call the zone 101.221.66.in-addr.arpa (and thus claiming the whole
>/24 as mine), reverse DNS would locally resolve, but not populate across
>the internet.
>
>What am I missing, or any ideas as to what I've been doing wrong?

You're not doing anything wrong.  The problem is with your ISP.  They're
supposed to be authoritative for 101.221.66.in-addr.arpa, but they're not:

% dig -x 66.221.101 any @ns.cihost.com +norec

; <<>> DiG 8.3 <<>> -x any @ns.cihost.com +norec 
; (1 server found)
;; res options: init defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 33964
;; flags: qr ra; QUERY: 1, ANSWER: 0, AUTHORITY: 2, ADDITIONAL: 2
;; QUERY SECTION:
;;	101.221.66.in-addr.arpa, type = ANY, class = IN

;; AUTHORITY SECTION:
101.221.66.in-addr.arpa.  15h34m7s IN NS  NS.CIHOST.COM.
101.221.66.in-addr.arpa.  15h34m7s IN NS  NS2.CIHOST.COM.

;; ADDITIONAL SECTION:
NS.CIHOST.COM.		8H IN A		216.221.162.81
NS2.CIHOST.COM.		8H IN A		216.221.162.111

;; Total query time: 55 msec
;; FROM: tools.genuity.com to SERVER: ns.cihost.com  216.221.162.81
;; WHEN: Thu Apr 18 14:26:26 2002
;; MSG SIZE  sent: 41  rcvd: 118

-- 
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
*** DON'T SEND TECHNICAL QUESTIONS DIRECTLY TO ME, post them to newsgroups.
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