Daniel
Premium,MVM
join:2000-06-26
Pleasanton, CA
clubs: 
|  reply to kosiac
Re: DNS in RT314 not working correctly
Hmm.
I used nslookup from a Linux box, perhaps that is why I got correct responses from both direct and indirect queries.
I am a bit confused as to why you would be having trouble though. I didn't know that vc was using TCP, but I do know that TCP 53 isn't used for queries, it is used for zone transfers.
So, going back to the original problem, why would an MX record lookup fail just because you couldn't correspond with a DNS server over TCP?
--
"Opportunities multiply as they are seized." - Sun Tzu |
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Rizal7
Best Cheater Wins
join:2001-02-21
Norway
| said by danielrm26:
So, going back to the original problem, why would an MX record lookup fail just because you couldn't correspond with a DNS server over TCP?
If you query the DNS proxy in the 314 with TCP it will never see your query because it does not listen for TCP connections, only UDP. Because its not a DNS server, but just a 128 line proxy and if the FQDN you want to lookup is not in the table it will query a DNS server for you.
The 314 was never intended to support zone transfers etc.
Go to CI mode and type the commands Synack listed, those will show you which ports the 314 is listening on for TCP and UDP connections.
Also try ip dns stats disp
Now weather your software uses TCP for mx record lookup is another issue.
Rizal
[text was edited by author 2002-07-31 03:22:01] |
|
Daniel
Premium,MVM
join:2000-06-26
Pleasanton, CA
clubs:
| DNS and RT314...
said by Rizal:
Now weather your software uses TCP for mx record lookup is another issue.
:)
Yes, that was my question. Why would it do that? I understand that the RT314 doesn't listen for DNS traffic on TCP 53, but that doesn't speak to why an MX lookup would fail.
--
"Opportunities multiply as they are seized." - Sun Tzu |
|
kosiac
join:2001-01-10
Dayton, OH
| I used a tool that monitor network connections (from sysinternals) and it show that inetinfo (windows smtp server is part of iis) was making TCP connections to 65.24.0.167, my external DNS server.
I posted in the windows group here to see if anyone know why Windows SMTP would use TCP. Also posted in the windows smtp NNTP group as well.
We will see.
--
- Dayton, Ohio, The TRUE Birthplace of Aviation - |
|
kosiac
join:2001-01-10
Dayton, OH
| I got a reply back on my post to the Microsoft newsgroup. The answer was "Unfortunately for Window 2000 you are stuck with TCP only.", according to a MS SMTP test engineer. Oh well, I will just use external NS hoss.
Thanks for the inputs.
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- Dayton, Ohio, The TRUE Birthplace of Aviation - |
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