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VietBob
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 Connection good, DNS bad!-2
DNS, Networking
One computer on LAN is unable to connect to Internet sites. LAN connects to Internet through a router, other computers have no problem. Other computers on LAN are acessible through MS Windows Network. I can ping IP's outside the network, but not URL's - "...could not find host..." Obviously can't connect to a URL with browser, attempts to connect with IP (gateway router or external IP) fails: - Opera: "Illegal address" reported. - Netscape: Nothing at all happens. _ IE: Familiar "page not found" page. Disabling Windows Firewall has no impact. I've never run into this behavior, and hope someone here will recognize it! Obviously the laptop isn't getting responses from the DNS Server, but not being able to connect using IP when Ping reports a clean connection has me baffled. Windows XP Home v. 5.1 (SP2) - to my knowledge the connection was fine after the user installed SP2; other computers on LAN are XP Pro SP1, so that's one difference... Gateway is SMC (NAT router); no change to router configuration since laptop connection worked fine. Thanks for your time! -Bob

Software/Hardware used:
ASKED: January 29, 2005  11:35 AM
UPDATED: January 30, 2005  9:52 AM
RELATED QUESTIONS
Answer Wiki:
Can you connect to the DNS server using telnet on port 53? Do you have the DNS server correctly configured on the client? Do you need to configure the proxy in your IE settings? Try running nslookup. It could be a number of things but it's probably something small you're just overlooking or assuming.
Last Wiki Answer Submitted:  January 30, 2005  5:28 am  by  Dantebrown   0 pts.
All Answer Wiki Contributors:  Dantebrown   0 pts.
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Thanks, it’s resolved.

Yesterday Bob suggested I check the HOSTS file; sure enough, it contained dozens of malicious entries.

I hadn’t run Ad-Aware or any spyware tools, since I wasn’t able to connect to the Internet to get them. I had performed a manual clean-up, but it obviously wan’t enough! After seeing the HOSTS file, I put Ad-Aware, Spybot Search & Destroy, and Spywareblaster on a CD. After running those, the problem was resolved.

When in doubt, blame Spyware! Thanks, and thanks Bob, for your suggestions!

-Bob

VietBob
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