How can I prevent DNS leak?

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5 comments

  • Avatar
    mattwilson9090

    What exactly was the leaktest supposed to tell you? What is the address for it?

     

    The pic you've attached is incomplete, so I'm not really sure what it was displaying, but it sounds like whatever you did told you the DNS addresses you are using. That isn't a DNS leak.

  • Avatar
    rotblitz

    "a 'DNS leak test' showed positive"

    Did it?  This cannot be derived from this picture?  Your picture shows that you were using OpenDNS.  Wasn't this your intention, or what makes you suspect that there's a DNS leak?

    And if you're using a VPN, your OS doesn't use the DNS configured for normal operation without VPN, but the one you may have especially configured for this VPN, or the one the VPN service is using, depending on how the VPN is supposed to work.

  • Avatar
    ranjitwp
    Thank you both for your comments. There are six different DNS addresses of Open DNS, shown during this test, along with the DNS addresses of the VPN, This test is available here - http://ipleak.net/ I have configured my computer and ISP for Open DNS. I can post a clear attachment here, showing all my active DNS addresses that are displayed during this test. The reason I didn't do so is, I assumed it will compromise my computer security if these are seen publicly by others who come to these forums. My Networking knowledge is very poor. So I may be wrong in this assumption. Could you please tell me whether it is safe to show my active DNS addresses by posting an attachment here. If I know the answer to this I can clarify my question better. Regards
  • Avatar
    rotblitz

    "I use a VPN to browse the Internet. While connected to the Internet through the VPN, a 'DNS leak test' showed positive. My DNS was displayed."

    Yes, clear now.  You produced a DNS leak, because you use a VPN, but you "have configured my computer and ISP for Open DNS" instead of using the VPN's DNS service.  You get what you configured!  And if this was with intention, it was safe to do so.

    "How can I prevent DNS leak?"

    Why would you want to prevent this?  I can't see a reason.
    Well, you may also want to try out the dnscrypt-proxy from http://dnscrypt.org/ which may be able to trick out the test at http://ipleak.net/
    Or do not use OpenDNS, but the VPN's DNS service if you trust them more than OpenDNS.

    "There are six different DNS addresses of Open DNS, shown during this test, along with the DNS addresses of the VPN"

    Hmm, this looks like you configured your system wrong.  You should see either only OpenDNS addresses or the ones of the VPN.  And OpenDNS should not have six addresses.

    "Could you please tell me whether it is safe to show my active DNS addresses"

    Well, these addresses are used by millions and therefore are no secret.  But for the same reason you don't need to post them.  We all know them.

    "My Networking knowledge is very poor."

    This may be the main reason why you posted this here.

  • Avatar
    ranjitwp
    Thank you for the clarifications above. They are very helpful to me. Best regards

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