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  • Internet connectivity problems (from a LAN machine)

    Hi,

    We are using an office-wide LAN, where one computer is exhibiting strange problems communicating with the internet (the other 12 computers work fine). The problematic computer is a Win2000 machine, as are the others.

    The symptoms:

    - All communications involving HTTP, FTP, SMTP and POP3 simply fail (Accessing all websites, sending/receiving mail, performing various software updates, etc).

    - Trying to telnet the relevant servers on these ports (80, 21, 25, 110) results in "Could not open a connection to host on port xx : Connect failed".

    - Other computers - on and off our LAN - can connect to the same servers on the same ports without a problem.


    The problematic computer is still able to:

    - Look up these addresses and ping them (NSLOOKUP, PING)

    - Use MSN Messenger

    - See and connect to other computers on the LAN, use shared folders, etc

    - I can still connect to that computer with my remote administration software (Radmin) which uses port 4899

    I have scanned for viruses, adware and malware - no such luck. There is no firewall installed on the computer itself. I've temporarily uninstalled the anti-virus software (Grisoft AVG) to see if that was the culprit - still the same problems.

    What gives? Someone has advised me to copy kernel32.dll from another Win2000 machine, said it could help.... I don't want to make things worse though. Any ideas for a better diagnostic/solution method?

    Thanks,

    AK

  • #2
    Re: Internet connectivity problems (from a LAN machine)

    Have you checked for errors in the event log? Try running a virus scan using free Trend Micro online scanner incase AVG cannot detect the virus. Have you tried a different browser? I'm guessing it's IE why don't you try Firefox and see if web browsing is still a problem.

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    • #3
      Re: Internet connectivity problems (from a LAN machine)

      Originally posted by tmlt
      Have you checked for errors in the event log? Try running a virus scan using free Trend Micro online scanner incase AVG cannot detect the virus. Have you tried a different browser? I'm guessing it's IE why don't you try Firefox and see if web browsing is still a problem.
      Thanks, but I see nothing in the event log that seems to pertain to the problem.

      At any rate, I can't use an online virus scanner, since browsing does not work (as anything HTTP-related). I'm positive that it's not IE-related, because -

      1) All non-IE HTTP communication also fails (telnet at port 80, various software updates done through the program itself, etc), and

      2) Other protocols and ports besides http/port 80 are also affected (ftp, smtp, pop3) as are the applications using them

      Thanks anyway. Any other ideas?

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      • #4
        Re: Internet connectivity problems (from a LAN machine)

        Sorry i meant to say use the online scanner with another browser

        Have you tried using the winsock repair fix/utility? I'm the past ive seen this mostly affect win98 machines but have seen it with 2000 and XP also.

        http://www.snapfiles.com/get/winsockxpfix.html

        http://windowsxp.mvps.org/winsock.htm

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        • #5
          Re: Internet connectivity problems (from a LAN machine)

          Well, it is a great utility which I've used in the past - for XP... however, as mentioned above, the problem machine runs Win2000.

          Is there something similar for Win2000? Maybe something that can be done from the command line?
          Last edited by intersilver; 29th March 2006, 22:21.

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          • #6
            Re: Internet connectivity problems (from a LAN machine)

            Try this from the command line, it works for 2k, XP and 2K3.:

            >netsh int ip reset logfile.txt

            http://support.microsoft.com/default...b;en-us;299357

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            • #7
              Re: Internet connectivity problems (from a LAN machine)

              Have you tested it on 2k? it gives me -
              "The following command was not found: int ip reset logfile.txt."

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              • #8
                Re: Internet connectivity problems (from a LAN machine)

                Try this:
                http://www.windowsnetworking.com/kba...portTools.html

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