Can't resolve Hostnames to IP

April 20, 2009 at 05:14:45
Specs: Windows XP
I'm trying to help someone with a their internet connection. For about 2 months they haven't been able to resolve hostnames. (can ping a google IP, but not Even IE can render a page (though no images that are addressed with a hostname) if entering the IP instead of website.
My first assumption was a problem with their dsl hub, they ended up switching to different isp and now have a direct cable modem setup from cox. They still have the exact same problem.
Complicating it further, my laptop connects with no problem at all to the same cable mode.
I thought maybe it was a bad NIC, so I connected the PC to the cable modem via USB and again same problem.
All settings in Network connections are identical between my friends PC and my laptop. Both machines running XP.
Any suggestions on what could be causing this?

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April 20, 2009 at 05:20:07
oh, and I did disable the firewall on my friends PC, that didn't help anything.

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April 20, 2009 at 05:30:13
Try a different DNS server(s), here are a couple,

If win xp, double click on your network connection icon in network connections and select properties and then choose internet protocol(tcp/ip) and click properties again. It's pretty much the same on vista.

First make sure there are no ips entered in the dns section at the bottom, then choose "use the following dns server address" and put the above 2 ips in there.

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April 20, 2009 at 05:59:43
I'm away from the machine right now, but I've already tried using the same DNS that worked for my laptop. Also, I would assume that I would have been pointing to 2 different sets of DNS between the 2 different ISPs.

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Related Solutions

April 20, 2009 at 12:31:41
If dns server number is correct then be sure with ipconfig /all.

Use nslookup for

If returns ip then look at hosts file.

"Best Practices", Event viewer, host file, perfmon, antivirus, anti-spyware, Live CD's, backups, are in my top 10

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April 21, 2009 at 05:08:17
I have run ipconfig /all DNS showed same IP on friends desktop as it did on my laptop, but still didn't work.

I haven't run nslookup, what would that do that is differant than what ping does with a hostname?

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April 21, 2009 at 06:06:18
Here are some options. First, it might not be a network problem.

simple: can it be a hijack? did u scan ure friend's computer?

normal: clean the registry and temp file, and temporary internet files and all the cash of your friend's computer. try again.

Annoying: in network connection, TCP/IP settings, Try to detect ip adress automatically from ure pc and than from ure friend's pc. than check the details of connection from both pc. See if there are different DNS or DHCP IP Settings.

Hard: Install the latest drivers of your friend's network card. If it still doesn't work, Can u check the network card of your friend on another pc?

Brutal: If both PC s are identical but ure friend still cannot connect, and if ure friend's hardware is super clean, registry ok, network settings properly configured, and no hijack or virus present, than it can be a Hard drive boot sector hijack. Check if there is a hidden partition in ure friend's PC. (usually the boot sector). If there is one, format it and merge it to the System partition. You can do this easily by installing a new OS on that partition. (vista setup detects all partitions when installing).


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April 21, 2009 at 06:11:33
Alternatively, you could try uninstalling the TCP/IP stack and then reinstalling it.

I've run into situations where something the the stack gets corrupted and nothing connects properly and this will fix that issue if this is the problem you're having.

I haven't run nslookup, what would that do that is differant than what ping does with a hostname?

At the risk of being rude, google is a most effective tool for say, looking up what both commands are, and what they do. So that you could figure out for yourself what is so different.

Believe me, there IS a difference between ping and nslookup.

I'll give you a hint. Ping is basically a single purpose tool and it does nothing with a hostname.

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April 22, 2009 at 06:14:27
rebuilding TCP/ip stack did not work.
nslookup successfully retrieved hostname info.
Norton didn't find any viruses (though that doesn't say much)
I tried with 2 different 'nics' (ethernet & USB), so that should rule out bad drivers, so I didn't bother with uninstall/reinstall of drivers.

I gave up, and just restored the PC to factory settings.

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May 6, 2009 at 04:32:26
It's strange. I've experienced the same and any above advices didn't help me to resolve this issue. Until I noticed that when I use another browser (I usually use Mozila Firefox so I tried to use IE) it was working. So I deleted all private data (cookies etc.) in Mozilla (in Tools/Options/Privacy sheet) and after that the hostnames recognizing start working again on my computer.

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