Two RFC2317 Questions
Barry Margolin
barmar at genuity.net
Wed Apr 10 18:39:09 UTC 2002
In article <a9206p$9ma at pub3.rc.vix.com>,
Barry Finkel <b19141 at achilles.ctd.anl.gov> wrote:
> I query the CNAME, and I get "NOERROR, ANSWER: 0" in response.
> Is there something else wrong with my configuration?
>britaine% dig 17.0.241.60.216.in-addr.arpa.
You forgot to specify the record type in this query.
>; <<>> DiG 8.3 <<>> 17.0.241.60.216.in-addr.arpa.
>;; res options: init recurs defnam dnsrch
>;; got answer:
>;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 4
>;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
>;; QUERY SECTION:
>;; 17.0.241.60.216.in-addr.arpa, type = A, class = IN
^^^^^^^^
Notice that dig defaults to querying for an A record.
When I specify PTR I get the expected result:
% dig -x 216.60.241.0.17 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: 1, AUTHORITY: 6, ADDITIONAL: 8
;; QUERY SECTION:
;; 17.0.241.60.216.in-addr.arpa, type = PTR, class = IN
;; ANSWER SECTION:
17.0.241.60.216.in-addr.arpa. 23h59m21s IN PTR csgax.able.anl.gov.
;; AUTHORITY SECTION:
0.241.60.216.in-addr.arpa. 1h59m20s IN NS dns1.anl.gov.
0.241.60.216.in-addr.arpa. 1h59m20s IN NS dns2.anl.gov.
0.241.60.216.in-addr.arpa. 1h59m20s IN NS ns2.es.net.
0.241.60.216.in-addr.arpa. 1h59m20s IN NS nsx.lbl.gov.
0.241.60.216.in-addr.arpa. 1h59m20s IN NS ns1.swbell.net.
0.241.60.216.in-addr.arpa. 1h59m20s IN NS ns2.swbell.net.
;; ADDITIONAL SECTION:
dns1.anl.gov. 22h9m41s IN A 130.202.20.5
dns1.anl.gov. 22h9m41s IN A 146.137.64.5
dns2.anl.gov. 22h9m41s IN A 146.139.254.3
dns2.anl.gov. 22h9m41s IN A 130.202.20.3
ns2.es.net. 18h48m47s IN A 134.55.6.130
nsx.lbl.gov. 11h59m21s IN A 131.243.64.3
ns1.swbell.net. 1d6h31m46s IN A 151.164.1.1
ns2.swbell.net. 1d6h31m46s IN A 151.164.1.7
;; Total query time: 30 msec
;; FROM: tools.genuity.com to SERVER: default -- 4.2.2.1
;; WHEN: Wed Apr 10 14:38:11 2002
;; MSG SIZE sent: 46 rcvd: 333
--
Barry Margolin, barmar at genuity.net
Genuity, Woburn, MA
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