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Thread: Unable to access certain websites: "destination host unreachable"?

  1. #1
    Junior Member
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    Unable to access certain websites: "destination host unreachable"?

    Whenever I try to access www.dlink.com (or subdomains), or www.dzone.com, I get a "Connection closed by remote server" error in Opera (similar messages in other browsers).

    When I try to ping or tracert either of the hosts, I get a "Destination host unreachable" error.

    This has also occurred on other websites, which I cannot remember right now, and occurs with both Optus (my ISP) and OpenDNS as dns servers.

    It also seems to be intermittent. Yesterday, I was able to access www.dzone.com without any issues for some time, yet today and the day before, this error was occurring.

    Also, possibly unrelated, the website www.tv.com is extremely slow when loading.

    Does anyone have any ideas as to what the issue is?

    EDIT: www.opera.com, and link.opera.com are also inaccessible
    Last edited by sb3700; 12-02-08 at 06:10 PM. Reason: Updating

  2. #2
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    Ignore double post, please.
    Last edited by sb3700; 12-02-08 at 06:11 PM. Reason: Double posted

  3. #3
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    Hrm...

    When you are having this problem can you resolve the hosts using something like: http://network-tools.com/

    And then go to the IPs directly from your browser?

  4. #4
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    The traceroute and ping work fine from network-tools.com, so it must be something from my end.

    The IP's are resolved correctly (when I ping or tracert, the IP shown is correct according to OpenDNS's cache). However, when typing either the hostname or the IP in the address bar, I still get the error.

    Thanks for reply.

    EDIT: Along those lines, a ping from my router is "successful", ie: in firmware, there is an option to ping hosts, and this returns successful. Also, all firewalls are disabled.

    EDIT again: www.dictionary.com does not work, but the basically aliased http://dictionary.reference.com/ does. However most of the images in http://dictionary.reference.com are served from http://sp.ask.com/ which doesn't load, whereas http://ask.com does. Very weird... :-[
    Last edited by sb3700; 12-02-08 at 06:56 PM. Reason: Hyperlinking

  5. #5
    Moderator YeOldeStonecat's Avatar
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    Is your PC free from malware? Lots of spyware trojans now mess with your TCP stack/winsock files....doing DNS redirects to their add servers. Try scanning your PC with several quality anti ad/spyware programs and antivirus, and run a TCP/Winsock repair utility.
    MORNING WOOD Lumber Company
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  6. #6
    Junior Member
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    try to use antimalwares.. run Malwarebytes...

  7. #7
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    Just an update.

    I formatted my computer (it was due for a long time...) and this resolved the problem. I never found the actual cause though. My computer was completely free of viruses and malware though (according to AVG free, Spybot, Spyware Terminator, and SuperAntiSpyware).

    Thanks anyway.

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