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I am having a very weird problem, this is the situation:

  • Company A have Internet from provider A
  • Company B have Internet from provider A

  • Company A cannot open site Y or ping
  • Company B can open site Y and ping

If I use a proxy at company A the site opens fine, which leads me to believe its a network issue.

Both companies are connected by the same ISP routes as they are right next to each other in physical location.

Is there a way to force it to refresh to recognize the site Y is alive and running ?

EDIT: also checked the hosts file nothing there that would break the site.

No firewall enabled either its a direct modem <> computer connection.

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Try to traceroute the IP address and see where routing breaks. –  FINESEC Nov 10 '12 at 18:26
    
@FINESEC it says it cant resolve the name –  Guapo Nov 10 '12 at 18:28
    
Then it's a name resolution problem, not a network or routing problem. –  joeqwerty Nov 10 '12 at 18:41
    
@joeqwerty and how do I resolve it if that is the case ? –  Guapo Nov 10 '12 at 18:41
    
If you're trying to ping by name (which is what I assume you did based on your response) and the name can't be resolved then it's a name resolution problem. Check the DNS servers that are assigned to the client and make sure that they're correct. –  joeqwerty Nov 10 '12 at 18:59

1 Answer 1

If it's a DNS issue, you might want to change your DNS server to 8.8.8.8 (google).

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If it was a DNS issue why company B would work given both companies use the same ISP and route and DNS like said on the question ? –  Guapo Nov 10 '12 at 18:46
1  
Maybe DNS response is cached on a computer of company B. –  FINESEC Nov 10 '12 at 18:49
1  
Nothing here indicates a DNS issue -- its possible, but that should be investigated before it's assumed (dig, nslookup, etc.). (If it IS a DNS issue the issue should be corrected -- switching to Google's public server masks the symptom without fixing the problem!) –  voretaq7 Nov 10 '12 at 19:09
    
@voretaq7 Could you give more details of what to do, dig/nslookup what reuslts should I expect and what to do afterwards ? –  Guapo Nov 10 '12 at 19:35
    
@FINESEC I appreciate the reply but I dont think changing my DNS to google is the way to resolve the issue like voretaq7 said and I also believe it is just a way around it without actually fixing it. –  Guapo Nov 10 '12 at 19:36

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