_MY_ resolver library is fine. That's how a customers new cisco reported it. Cisco Internetwork Operating System Software IOS (tm) C2600 Software (C2600-I-M), Version 12.1(3a), RELEASE SOFTWARE (fc1) Copyright (c) 1986-2000 by cisco Systems, Inc. Compiled Thu 27-Jul-00 01:06 by cmong Image text-base: 0x80008088, data-base: 0x807DA180 --- John Fraizer EnterZone, Inc On Fri, 23 Feb 2001, Stephen Stuart wrote:
7 65.64/27.183.34.216.in-addr.arpa (216.34.183.65) 16 msec 20 msec 20 msec
Oops, indeed; you'd better upgrade your resolver library to understand classless in-addr per RFC 2317:
% dig -x 216.34.183.65 ptr
; <<>> DiG 8.3 <<>> -x ptr ;; res options: init recurs defnam dnsrch ;; got answer: ;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 2 ;; QUERY SECTION: ;; 65.183.34.216.in-addr.arpa, type = PTR, class = IN
;; ANSWER SECTION: 65.183.34.216.in-addr.arpa. 23h59m47s IN CNAME 65.64/27.183.34.216.in-addr.arpa. 65.64/27.183.34.216.in-addr.arpa. 1D IN PTR bbr01-g3-0.okbr01.exodus.net.
;; AUTHORITY SECTION: 64/27.183.34.216.in-addr.arpa. 23h57m10s IN NS bengi-w.exodus.net. 64/27.183.34.216.in-addr.arpa. 23h57m10s IN NS bengi-e.exodus.net.
;; ADDITIONAL SECTION: bengi-w.exodus.net. 12m10s IN A 209.1.221.10 bengi-e.exodus.net. 12m10s IN A 216.33.108.70
;; Total query time: 3 msec ;; [...]
Stephen