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Can't access web-sites, but MSN, ping works!

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Last Modified: 2013-12-14
Hello Experts,

This one got me stumbled...
I can PING domain names, MSN works, but IE or Firefox cannot load web-sites!

Friend's PC:
Windows XP SP2, Comcast cable modem connected straight to the computer w/ Ethernet cable.
Internet Explorer, Firefox3 opens up, but 'Server Cannot be found' page appears.
At first i tried using Firefox2, and it worked well!! But then i updated to Firefox3, and no more connection!

Problem occurred once Linksys router was removed from the LAN.

Comcast tech came over, and could access the WEB using his laptop.
I can PING web-sites, and MSN messenger loads and works well.
Computers gets dynamic pubic IP assigned by Comcast.
I tried disabling firewall, reinstalling IE7, settings in Windows Networking seem fine.
There aren't any blockers or additional firewalls installed to our knowledge.

What tha hell!?

Thank You.
Comment
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Commented:
do you have IE automatically checking proxy settings? in IE go to Tools>Internet Options>Connections Tab>LAN Settings (halfway down window). make sure everything is unticked in the window that opens
CERTIFIED EXPERT
Top Expert 2013

Commented:
It may be that you do not have the proper DNS settings entered in the network adapter's configuration. As a test can you reach a web site such as Google using the IP: http://64.233.187.99/ 
If that works verify your DNS.

If connecting by IP doesn't work you may have a corrupted winsock. Make sure you have protection from the Internet, either by a replacement firewall, or enable the Windows firewall. A Winsock issue is corruption of the TCP/IP stack. Most often this is the result of a virus or spyware, but not always. To repair see the Microsoft solution:
http://windowsxp.mvps.org/winsock.htm
Or, you can use a third party utility:
http://www.softpedia.com/progDownload/WinSock-XP-Fix-Download-7144.html
 
If it still doesn't work there are other similar solutions:
XP TCP/IP repair utility
http://www.softpedia.com/get/Tweak/Network-Tweak/XP-TCP-IP-Repair.shtml
LSPFix
http://www.cexx.org/lspfix.htm

Author

Commented:
I tried checking and un-checking all the settings (such as automatic config and proxy discovery) in IE and Firefox w/o any luck.

Rob, i assume if i can successfully ping www.yahoo.com, then my DNS server is fine, i even tried setting static DSN server as OpenDNS> 208.67.222.222, no luck there.

I also thought that TCP/IP stack was damaged by a virus or spyware, before i left i started an A/V scan. So i guess i'll try to look into fixing that area.

I'll report back soon.

Thanks.

Commented:
Kaptain1,,
Take a quick look through the Task Manager and make sure you don't have a vsmon.exe running or even just vsmon.
Either one indicates ZA firewall or variant of it.

"At first i tried using Firefox2, and it worked well!! But then i updated to Firefox3, and no more connection!" This sounds like a software firewall stopping new program from accessing the net.

You might want to Download and run Hijack This http://www.tomcoyote.org/hjt/
Post the log to this site as a text file or as code so we can see what's running.

Author

Commented:
mtz1of4, leftover from a software firewall or some kind of a nanny-blocking program may also be a possibility. I know they had Norton Security 2007 installed, but now it has been removed.

I've looked at the All Programs, but i didn't see any firewall or blocking programs there. I'll try your recommendations though. Thanks!
Commented:
This one is on us!
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