| sneakyimp |
07-13-2010 07:25 PM |
DNS fail: can't resolve subdomains, server giving wrong response
I've got a DNS problem I cannot figure out. I've been digging and pinging all day and I've waited for caches to expire and I'm not having much luck. Any help would be much appreciated.
From my desktop mac, I can't seem to resolve mail.port-o-call.net:
Code:
My-Mac:~ sneakyimp$ ping mail.port-o-call.net
ping: cannot resolve mail.port-o-call.net: Unknown host
whereas port-o-call.net resolves just fine:
Code:
My-Mac:~ sneakyimp$ ping port-o-call.net
PING port-o-call.net (67.14.192.54): 56 data bytes
64 bytes from 67.14.192.54: icmp_seq=0 ttl=50 time=74.573 ms
64 bytes from 67.14.192.54: icmp_seq=1 ttl=50 time=85.275 ms
Curiously, I can dig port-o-call.net and get a very reasonable output:
Code:
My-Mac:~ sneakyimp$ dig port-o-call.net
; <<>> DiG 9.4.3-P3 <<>> port-o-call.net
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 57523
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0
;; QUESTION SECTION:
;port-o-call.net. IN A
;; ANSWER SECTION:
port-o-call.net. 604517 IN A 67.14.192.54
;; Query time: 97 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Tue Jul 13 17:16:12 2010
;; MSG SIZE rcvd: 49
But when I dig mail.port-o-call.net, I get some info that i know is outdated and which lacks an ANSWER section.
Code:
My-Mac:~ sneakyimp$ dig mail.port-o-call.net
; <<>> DiG 9.4.3-P3 <<>> mail.port-o-call.net
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 7671
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;mail.port-o-call.net. IN A
;; AUTHORITY SECTION:
port-o-call.net. 10471 IN SOA ns2.radicalcomputingconcepts.com. keystone.peardrax.cei.net. 2010071301 28800 7200 604800 39600
;; Query time: 103 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Tue Jul 13 17:17:21 2010
;; MSG SIZE rcvd: 128
Am I correct in thinking that the previous response would result in a query to the servers in the SOA record? If so, I get this from ns2.radicalcomputingconcepts.com:
Code:
My-Mac:~ sneakyimp$ dig @ns2.radicalcomputingconcepts.com mail.port-o-call.net
; <<>> DiG 9.4.3-P3 <<>> @ns2.radicalcomputingconcepts.com mail.port-o-call.net
; (1 server found)
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 37351
;; flags: qr aa rd; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 2
;; WARNING: recursion requested but not available
;; QUESTION SECTION:
;mail.port-o-call.net. IN A
;; ANSWER SECTION:
mail.port-o-call.net. 600 IN A 67.14.192.54
mail.port-o-call.net. 600 IN A 67.14.192.54
;; AUTHORITY SECTION:
port-o-call.net. 259200 IN NS ns1.radicalcomputingconcepts.com.
port-o-call.net. 259200 IN NS ns2.radicalcomputingconcepts.com.
;; ADDITIONAL SECTION:
ns1.radicalcomputingconcepts.com. 259200 IN A 67.14.192.56
ns2.radicalcomputingconcepts.com. 259200 IN A 66.55.47.207
;; Query time: 68 msec
;; SERVER: 66.55.47.207#53(66.55.47.207)
;; WHEN: Tue Jul 13 17:21:33 2010
;; MSG SIZE rcvd: 166
Question 2: Where is this response coming from?
I can't help but wonder where this response comes from, because ns2 has a different answer and the server at cei.net doesn't exist. Why is there no answer section?
Code:
My-Mac:~ sneakyimp$ dig mail.port-o-call.net
; <<>> DiG 9.4.3-P3 <<>> mail.port-o-call.net
;; global options: printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NXDOMAIN, id: 7671
;; flags: qr aa rd ra; QUERY: 1, ANSWER: 0, AUTHORITY: 1, ADDITIONAL: 0
;; QUESTION SECTION:
;mail.port-o-call.net. IN A
;; AUTHORITY SECTION:
port-o-call.net. 10471 IN SOA ns2.radicalcomputingconcepts.com. keystone.peardrax.cei.net. 2010071301 28800 7200 604800 39600
;; Query time: 103 msec
;; SERVER: 192.168.1.1#53(192.168.1.1)
;; WHEN: Tue Jul 13 17:17:21 2010
;; MSG SIZE rcvd: 128
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