How to unblock websites using Public DNS Systems

For this you first have to know about the DNS.

   

a DNS (Domain Name Server) -

a DNS is a server, which converts a particular domain name into its respective IP address. Many organizations and colleges have a habit of blocking access to certain websites by either blocking DNS queries to these domain names or by redirecting users to a "This website is BLOCKED" page.

  

 For ex-

 when you type www.facebook.com in your browser, it will send a request to local DNS server, which could block or redirect the user to some other website.

To overcome this issue you must use a public DNS servers instead of local DNS servers. There are a lot of Public DNS servers, some of them are-

• Google DNS                         8.8.8.8                    8.8.4.4
• Open DNS                     208.67.222.222       208.67.220.220
• DNS Advantage              156.154.70.1           156.154.71.1  
• Norton DNS                   198.153.192.1         198.153.194.1
• DNS Resolvers              205.210.42.205        64.68.200.200

  Now to make your computer connect to the google Public DNS server, You just have to follow the steps below-

Step 1-

Go to CONTROL PANEL > NETWORK AND INTERNET > NETWORK AND SHARING CENTRE .  It will look like this...

Step 2-  

Now click on  the CHANGE ADAPTER SETTINGS. After that right click on the connection you want to configure, click on properties. It will look like this...

 Step 3-

A window will pop-up. you have to go to networking tab. It will look like this...

Step 4-

Now Double click on the "Internet Protocol Version 4". the new open window will look like this..

Step 5-

Now select the option "USE THE FOLLOWING DNS SERVER ADDRESSES" and enter the google DNS server address:

in preferred DNS server:     8.8.8.8

in alternative DNS server:   8.8.4.4

Step 6-

All you have to do is disconnect the network and reconnect it. Now you can enjoy a fully unblocked Internet without any DNS filtering in place.

More Advantages-

There are much more advantages of using such public DNS servers instead of local DNS servers:

• usually faster due to server locations and large cached databases.
• Includes filtering and protection against phising.
• correct typos (gogle.com automatically becomes google.com)