These days, the famous social networks like Facebook or Twitter have been blocked by ISPs in many Asian countries (including Vietnam and China). In a recent article, I presented 7 Ways To Access Blocked Facebook from vtechtip.com. These tips helped us a lot, but there are some problems we still have to face, such as some tips are quite complex whereas some are not so efficient (in speed and other functionalities). Today I have a good news for Facebook users in Vietnam.
Google is launching its own public DNS resolver called Google Public DNS, and they invite us to try it out. I have tried it to access Facebook and it is quite excellent, moreover the procedure is very simple, it takes you less than 1 minute!
These are the elaborate steps to configure in Windows:

1. Go the Control Panel.
2. Click Network and Internet, then Network and Sharing Center, then Manage network connections.
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, and click Properties.
   • To change the settings for a wireless connection, right-click Wireless Network Connection, and click 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, click Internet Protocol Version 4 (TCP/IPv4), 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: 8.8.8.8 and 8.8.4.4.
9. Restart the connection you selected in step 3.
10. Test that your setup is working correctly.
(code.google.com)

All done! Have a good time with Facebook and Twitter. If you have any problem when executing this method, please comment below.