[3979] in testers
reverse resolution
daemon@ATHENA.MIT.EDU (Dan Winship)
Fri Apr 23 18:42:06 1999
Date: Fri, 23 Apr 1999 22:41:25 GMT
Message-Id: <199904232241.WAA400887@antharia.mit.edu>
From: Dan Winship <danw@MIT.EDU>
To: testers@MIT.EDU
I was having reverse-resolution problems that went away when I forced
certain entries into my named's cache:
danw@antharia:uip> dig @localhost in any 94.39.52.128.in-addr.arpa
; <<>> DiG 8.2 <<>> @localhost in any 94.39.52.128.in-addr.arpa
; (1 server found)
;; res options: init recurs defnam dnsrch
;; got answer:
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 10
;; flags: qr rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 0, ADDITIONAL: 0
;; QUERY SECTION:
;; 94.39.52.128.in-addr.arpa, type = ANY, class = IN
;; Total query time: 3 msec
;; FROM: antharia.mit.edu to SERVER: localhost 127.0.0.1
;; WHEN: Fri Apr 23 18:29:00 1999
;; MSG SIZE sent: 43 rcvd: 43
(boring lines omitted from following dig output)
danw@antharia:uip> dig @localhost in any 42.52.128.in-addr.arpa
;; ->>HEADER<<- opcode: QUERY, status: SERVFAIL, id: 10
danw@antharia:uip> dig @localhost in any 52.128.in-addr.arpa
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10
;; ANSWER SECTION:
52.128.in-addr.arpa. 5d12h42s IN NS BEET-CHEX.AI.MIT.EDU.
52.128.in-addr.arpa. 5d12h42s IN NS LIFE.AI.MIT.EDU.
52.128.in-addr.arpa. 5d12h42s IN NS ALPHA-BITS.AI.MIT.EDU.
That one finally worked. So now if we try things that failed before:
danw@antharia:uip> dig @localhost in any 42.52.128.in-addr.arpa
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10
;; AUTHORITY SECTION:
52.128.in-addr.arpa. 30M IN SOA mintaka.lcs.mit.edu. bug-ai-domain.life.ai.mit.edu. (
danw@antharia:uip> dig @localhost in any 94.39.52.128.in-addr.arpa
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 10
;; ANSWER SECTION:
94.39.52.128.in-addr.arpa. 30M IN PTR suspiria.ai.mit.edu.
It's not completely reproduceable if I restart named.
-- Dan
