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I have a website www.abc.com (example) that has the IP (Example: 66.166.291.23).

The website is not opening the home page on my PC by typing www.abc.com, but is running fine on all other machines of my team. I checked the hosts to see if the website has been blocked somehow, but the hosts files does not contain any other content other than default.

If I run the website directly through the IP, it runs fine and I am able to view the home page.

From cmd, if I type the command:

ping www.abc.com  - Ping request coud not find www.abc.com Please check the same and try again
ping 66.166.291.23 - Successful

I also have two subdomain on the same host associated with the website i.e. code.abc.com and blog.abc.com and surprisingly both of them are running fine. (cmd ping also successful for both of them)

I installed Fiddler to see what the heck is happening, and then on running fiddler, when I run the website www.abc.com, I get the folloing error in browser:

[Fiddler] DNS Lookup for "www.abc.com" failed. The requested name is valid, but no data of the requested type was found

Any idea why the website is not running on my machine. This is running fine on all other machine and with the users as well. I am on Windows 7 32 bit.

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You're not infected with dnschanger by any chance, are you? – womble Jul 19 '12 at 13:04
3  
It's fairly obvious from the information in your question that this is a DNS problem. Have you verfified your DNS configuration? Have you compared your DNS settings to those on a machine that works? – joeqwerty Jul 19 '12 at 13:06
@womble: All other sites are working and this site as working fine until this morning. I contacted my hosting domain provider and got a reply that the site is working for them. – Cipher Jul 19 '12 at 13:18
@joeqwerty: I am not sure about the steps I have to follow for this. Can you please elaborate on this? – Cipher Jul 19 '12 at 13:18
Could you also state the OS used on your PC? This helps on suggesting tools (wouldn't be good to recommend something you cannot use, would it?). – Izzy Jul 19 '12 at 15:36
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migrated from serverfault.com Jul 19 '12 at 13:15

2 Answers

up vote 1 down vote

I would try opening up a command prompt and typing in "ipconfig /flushdns" and see if that works.

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Summarizing from the comments on the question:

This is a local DNS problem. Your machines have no working DNS server configured (looks like your providers DHCP is messed up). Your options:

  • Contact your ISP and present him this information. Ask him to fix his DHCP.
  • Get yourself a router to put between your PCs and the ISP. Then configure your PCs with static IP / DNS servers. This way it doesn't matter what your provider's DHCP is doing (OK, the router may be unable to resolve things), as your PCs have their own fixed configuration (which doesn't get messed up on "ISP disconnects"

There may be some more options -- but I'd say the first one should be your final goal. As soon as you get correct servers by DHCP, your problem is gone. Second option provides a work around you can establish even if your ISP does not comply (think about another ISP then, for sure!) -- but in the long run gives you additional options for other things in your local network.

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