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Re: Working network connectivity, not working DNS resolutions





On Mon, Mar 29, 2010 at 3:00 AM, Mike Viau <viaum@sheridanc.on.ca> wrote:
Could there be an issue with MTU size?

don't thing so

[snip]

My findings.

# dig @10.254.2.254 google.com

; <<>> DiG 9.4.3-P2 <<>> @10.254.2.254 google.com
; (1 server found)
;; global options:  printcmd
;; Got answer:
;; ->>HEADER<<- opcode: QUERY, status: NOERROR, id: 27942
;; flags: qr rd ra; QUERY: 1, ANSWER: 1, AUTHORITY: 0, ADDITIONAL: 0

;; QUESTION SECTION:
;google.com.                    IN      A

;; ANSWER SECTION:
google.com.             55      IN      A       66.249.91.104

;; Query time: 4 msec
;; SERVER: 10.254.2.254#53(10.254.2.254)
;; WHEN: Fri Mar 26 01:02:53 2010
;; MSG SIZE  rcvd: 44
[snip]

So DNS does work on this box, as it forward DNS replies to other boxes on my
local network.

What should I do next? Any ideas?

try the dig command from one of the boxes that can't get dns, follow the packet with tcpdump

all you have shown above is that your router can get dns


Thanks.


-M

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