Intermittent DNS issues with PC connected through LAN port


  1. adrian00
    Posts : 6
    Windows 7 Professional 64 Bit
       New #1

    Intermittent DNS issues with PC connected through LAN port


    I've been experiencing issues with my internet connection on just one of my computers over the last 4 days.
    From time to time, my browsers stop loading web pages, and then start working again on their own.
    Restarting the computer or the modem/router doesn't solve anything as I do this everyday.
    I'm positive that the problem is in this computer, as the notebook I use (also connected through the LAN ports) never experienced this issue.
    Using Windows Troubleshooting during the issue showed the DNS problem. (Screenshot in attachment)

    This issue hasn't stopped any current downloads or connections (i.e., streaming a video, downloading or uploading anything).

    The only thing that I can think of is it might be related with this fix that I used a few days before this issue started, otherwise I haven't done any other changes or installed any new software.

    Windows Update - Reset

    In another website I found someone having a similar issue, they said it might be related to a Windows Update: KB2705219, I've tried uninstalling it but this didn't solve it.

    Anyone has an idea of what can be caussing this?

    System:
    Running Windows 7 64 Professional w/ latest updates
    Attached Thumbnails Attached Thumbnails Intermittent DNS issues with PC connected through LAN port-dns.jpg  
    Last edited by adrian00; 01 Oct 2012 at 19:20. Reason: System Specs
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  3. wanchoo
    Posts : 1,167
    Windows 7 Pro with SP1 32bit
       New #2

    Try using Google DNS.

    Google Preferred DNS = 8.8.8.8

    Google Alternate DNS = 8.8.4.4

    Before you change to Google DNS please keep a note of the Existing DNS so that if need be you can revert back. These are IPv4 addresses. If you are on IPv6 then you can get those addresses too on the Net from https://developers.google.com/speed/...dns/docs/using.

    Good luck
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  4. kbrady1979
    Posts : 2,973
    Windows 7 Professional 64bit SP1
       New #3

    Check and see if your desktop and laptop are using the same DNS servers. Navigate to your LAN Connection > Right click > Properties > Internet Protocol Version 4(TCP/IPv4) > Properties. To change your DNS settings, click on the "Use the following DNS server addresses" radio button and type in the preferred and alternate addresses. If both your desktop and laptop are configured to automatically obtain addresses, and you want to test other DNS servers out, you can try either OpenDNS or Google DNS server addresses. See how that works.
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  6. adrian00
    Posts : 6
    Windows 7 Professional 64 Bit
    Thread Starter
       New #4

    Thank you.

    Both the Desktop and Laptop are set to automatically obtain DNS addresses from the router.

    DNS is provided by the ISP.

    DNS Servers . . . . . . . . . . . : 192.168.1.1 <<< (Router's IP)

    This is what made me think the problem is in my Desktop, if it was my ISP DNS I think it should affect both computers.


    I will try using Google DNS, and report back in a couple of days.
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  7. adrian00
    Posts : 6
    Windows 7 Professional 64 Bit
    Thread Starter
       New #5

    Update:

    So far Google DNS is working.

    I had a crazy idea and tried to ping my IPS's DNS server, and I can't reach it, not from my Desktop or Laptop.

    So, I changed back to 'automatically obtain DNS addresses', but I had no issues (for the time I set it that way).

    I asked a couple of friends to ping the DNS address and they can't reach it either, this is odd.

    I'll keep monitoring the performance using Google DNS.


    Meanwhile. Is there any way to scan to see if there's anything messing with my modem/router or between my PC and router?

    Just in case I already run in-depth scans using NOD32, Malwarebytes, Windows Defender, everything came up clean.
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  8. kbrady1979
    Posts : 2,973
    Windows 7 Professional 64bit SP1
       New #6

    Your ISP's DNS servers may be down, or they may be working on them, or the wind might be blowing the wrong way........who knows. You could call your ISP and ask them if they know anything about their DNS servers acting flaky here lately. Or you could keep using OpenDNS or Google DNS servers and rock on. I switched from Comcast's DNS servers to OpenDNS a few months ago and have had zero issues to date.
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  10. adrian00
    Posts : 6
    Windows 7 Professional 64 Bit
    Thread Starter
       New #7

    Well, I had no issues at all over the last week using Google DNS. So I'm going to keep this configuration.

    I won't even bother calling my ISP, I can already imagine the conversation:
    Can you reboot your computer?
    Can you reboot your router?
    Oh, it's affecting only one computer? You must have a virus...
    We don't have any problems with our servers at the moment...

    Thank you all for your help.
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