Help tracing out a strange lookup case

Scott Haneda talklists at newgeo.com
Thu Dec 25 01:13:56 UTC 2008


Trying to help a client, they stumped me today.

dig crm.share-ideas.com

; <<>> DiG 9.4.2-P2 <<>> crm.share-ideas.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 35978
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;crm.share-ideas.com.		IN	A

;; ANSWER SECTION:
crm.share-ideas.com.	3600	IN	A	213.242.225.169

;; Query time: 999 msec
;; SERVER: 208.57.0.11#53(208.57.0.11)
;; WHEN: Wed Dec 24 07:51:24 2008
;; MSG SIZE  rcvd: 53


; <<>> DiG 9.4.2-P2 <<>> crm.share-ideas.com
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 2018
;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;crm.share-ideas.com.		IN	A

;; ANSWER SECTION:
crm.share-ideas.com.	3380	IN	CNAME	share-ideas.com.
share-ideas.com.	3600	IN	A	89.111.181.186

;; Query time: 241 msec
;; SERVER: 208.57.0.10#53(208.57.0.10)
;; WHEN: Wed Dec 24 07:52:47 2008
;; MSG SIZE  rcvd: 67

These are the local rr's for my clients ISP, used in his http and  
email servers etc.  As you can see, two different A record results,  
for each of the two IP's of the ISP's rr.

Currently, I can not replicate this behavior.  Maybe they made a  
chance, it it just did not make it out to the rr's fast, I am waiting  
on a reply for that question.  How can I see the serial in a zone, is  
that possible?

What stumps me is the following, run here, at a coffee shop, I am  
using openDNS
dig crm.share-ideas.com @208.57.0.10 A +trace
dig crm.share-ideas.com @208.57.0.11 A +trace

Both work, I get a answer back from
;; Received 126 bytes from 193.0.14.129#53(k.root-servers.net) in 2 ms
crm.share-ideas.com.	1611	IN	A	213.242.225.169

What also has me wonering, is if I ssh into my clients machine, which  
has the ISP's rr listed on that machine to be used, I can not get  
anything back:

dig crm.share-ideas.com @208.57.0.10 A +trace
;; connection timed out; no servers could be reached

dig crm.share-ideas.com @208.57.0.11 A +trace
;; global options:  printcmd
;; connection timed out; no servers could be reached

Those two command work anywhere else, just not on his machine for some  
reason.  Stumped.  Thanks.
--
Scott




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