Two RFC2317 Questions

[Joseph S D Yao]

On Wed, Apr 10, 2002 at 01:17:56PM -0500, Barry Finkel wrote:
>     I query the IP address; I get the CNAME in response.
>          17.0.241.60.216.in-addr.arpa.
> 
>     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 need to request the "PTR" record.

dig ptr 17.0.241.60.216.in-addr.arpa.

; <<>> DiG 8.3 <<>> ptr 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 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.  23h58m26s IN PTR  csgax.able.anl.gov.

;; AUTHORITY SECTION:
0.241.60.216.in-addr.arpa.  1h57m58s IN NS  ns2.swbell.net.
0.241.60.216.in-addr.arpa.  1h57m58s IN NS  dns1.anl.gov.
0.241.60.216.in-addr.arpa.  1h57m58s IN NS  dns2.anl.gov.
0.241.60.216.in-addr.arpa.  1h57m58s IN NS  ns2.es.net.
0.241.60.216.in-addr.arpa.  1h57m58s IN NS  nsx.lbl.gov.
0.241.60.216.in-addr.arpa.  1h57m58s IN NS  ns1.swbell.net.

;; ADDITIONAL SECTION:
ns2.swbell.net.		1d19h38m29s IN A  151.164.1.7
dns1.anl.gov.		17h47m37s IN A	130.202.20.5
dns1.anl.gov.		17h47m37s IN A	146.137.64.5
dns2.anl.gov.		17h47m37s IN A	146.139.254.3
dns2.anl.gov.		17h47m37s IN A	130.202.20.3
ns2.es.net.		3h10m54s IN A	134.55.6.130
nsx.lbl.gov.		1h41m11s IN A	131.243.64.3
ns1.swbell.net.		1d19h38m29s IN A  151.164.1.1

;; Total query time: 12 msec
;; FROM: ... to SERVER: ...
;; WHEN: Wed Apr 10 15:00:52 2002
;; MSG SIZE  sent: 46  rcvd: 333

-- 
Joe Yao				jsdy at center.osis.gov - Joseph S. D. Yao
OSIS Center Systems Support					EMT-B
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