Take the 2-minute tour ×
Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Every time I want to visit a website, I first get

Unable to resolve the server's DNS address.

Doesn't matter what browser. When I refresh a couple of times, the page opens.

I tried flushing my DNS cache, and reinstalling network adapter driver. Didn't work.
I tried using Google's public DNS server (8.8.8.8), still didn't work.

I tried debugging DNS lookup with this command:

nslookup -debug www.google.com 8.8.8.8

and it worked sporadically. It would work a couple of times, and then for 2-3 minutes it would return "DNS request timeout". All the while a torrent file is happily downloading in the background, so I guess new connections are a problem.

When I use other computers on my network, everything works OK. I'm using cable connection, not Wi-Fi.

How can I troubleshoot what's going on with my networking?

share|improve this question
1  
Wireshark and a book on TCP/IP (Comer, Stevens, ...) –  RedGrittyBrick Nov 22 '12 at 14:51
    
It's been long since I've learned about Wireshark in college. @RedGrittyBrick do you mean that Wireshark could help me with my particular problem? –  ttkalec Nov 22 '12 at 14:55
    
Yes, I'd use it to see what is being sent where. –  RedGrittyBrick Nov 22 '12 at 14:59
    
Tnx @RedGrittyBrick, I'll try it. –  ttkalec Nov 22 '12 at 15:08

1 Answer 1

what is the best way to troubleshoot what's going on with my networking?

I'd use Wireshark to see what is being sent where

and a book on TCP/IP (Comer, Stevens, ...) to understand why.

share|improve this answer

Your Answer

 
discard

By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.