Speed up your browsing with Google's Public DNS

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Google Public DNS: what it is and isn't
Google Public DNS is a recursive DNS resolver, similar to other publicly available services. We think it provides many benefits, including improved security, fast performance, and more valid results. See below for an overview of the technical enhancements we've implemented.
Google Public DNS is not, however, any of the following:
  • A top-level domain (TLD) name service.
  • A DNS hosting or failover service. Google Public DNS is not a third-party DNS application service provider, such as DynDNS, that hosts authoritative records for other domains. 
  • An authoritative name service. Google Public DNS servers are not authoritative for any domain. Google maintains a set of other nameservers that are authoritative for domains it has registered, hosted at ns[1-4].google.com.
  • A malware-blocking service. Google Public DNS rarely performs blocking or filtering, though it may if we believe this is necessary to protect our users from security threats. In such extraordinary cases, it simply fails to answer; it does not create modified results.

  • Configure your network settings to use the IP addresses 8.8.8.8 and 8.8.4.4 as your DNS servers.
If you decide to try Google Public DNS, your client programs will perform all DNS look-ups using Google Public DNS.

>>>>How to configure in Windows


DNS settings are specified in the TCP/IP Properties window for the selected network connection.
Example: Changing DNS server settings on Windows
  1. Go to the Control Panel.
  2. Click Network and Internet > Network and Sharing Center > Change adapter settings.
  3. Select the connection for which you want to configure Google Public DNS. For example:
    • To change the settings for an Ethernet connection, right-click Local Area Connection > Properties.
    • To change the settings for a wireless connection, right-click Wireless Network Connection > Properties.
    If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
  4. Select the Networking tab. Under This connection uses the following items, select Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6) and then click Properties.
  5. Click Advanced and select the DNS tab. If there are any DNS server IP addresses listed there, write them down for future reference, and remove them from this window.
  6. Click OK.
  7. Select Use the following DNS server addresses. If there are any IP addresses listed in the Preferred DNS server or Alternate DNS server, write them down for future reference.
  8. Replace those addresses with the IP addresses of the Google DNS servers:
    • For IPv4: 8.8.8.8 and/or 8.8.4.4.
    • For IPv6: 2001:4860:4860::8888 and/or 2001:4860:4860::8844.
  9. Restart the connection you selected in step 3.
  10. Test that your setup is working correctly; 

To test that the Google DNS resolver is working:

  1. From your browser, type in a hostname (such as http://www.google.com/). If it resolves correctly, bookmark the page, and try accessing the page from the bookmark. If both of these tests work, everything is working correctly. If not, go to step 2.
  2. From your browser, type in a fixed IP address. You can use http://18.62.0.96/ (which points to the websitehttp://www.eecs.mit.edu/) as the URL.1 If this works correctly, bookmark the page, and try accessing the page from the bookmark. If these tests work (but step 1 fails), then there is a problem with your DNS configuration; check the steps above to make sure you have configured everything correctly. If these tests do not work, go to step 3.
  3. Roll back the DNS changes you made and run the tests again. If the tests still do not work, then there is a problem with your network settings; contact your ISP or network administrator for assistance.

To change your settings on a router:

  1. In your browser, enter the IP address to access the router's administration console.
  2. When prompted, enter the password to access network settings.
  3. Find the screen in which DNS server settings are specified.
  4. If there are IP addresses specified in the fields for the primary and secondary DNS servers, write them down for future reference.
  5. Replace those addresses with the Google IP addresses:
    • For IPv4: 8.8.8.8 and/or 8.8.4.4.
    • For IPv6: 2001:4860:4860::8888 and/or 2001:4860:4860::8844.
  6. Save and exit.
  7. Restart your browser.

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