I have previously written some articles/tutorials on How to access blocked websites at school/college/office/cyber cafes etc.

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These methods can still help you to unblock websites. But then, there is no fool-proof way as such since it all depends on how smart your network admin is. So, here I present yet another way to access blocked sites which is based on the method of bypassing URL filtering employed by the admin.


Access Blocked Websites by Bypassing URL Filtering

Most of the network admins in schools and colleges block a website by its name (http://www.xxx.com) or by its IP address. Assuming this is the case, we will learn about a way to bypass the URL filtering.

Step 1: Find out the IP address of the blocked website which you are trying to access. Let us take http://techpp.com as our example. Go to Start –> Run and type cmd

 

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A new window opens. Type ping techpp.com and press Enter. You will see the IP address as shown below.

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IP address of techpp.com = 67.222.24.82

Step 2: Convert each of the 4 numbers (67, 222, 24 and 82) into an 8-digit binary value. In order to do this open your Windows calculator, select Scientific view.

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Make sure ‘Dec’ is selected and enter the first number and select ‘Bin’. This would give you 8 digit binary value of 67 = 01000011.

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Repeat the process for other 3 numbers as well. You will get four 8-digit binary equivalents. Put them all together

01000011110111100001100001010010

Step 3: Convert 01000011110111100001100001010010 into a decimal value. For this, reverse the process explained in Step 2 i.e Select Bin and input 01000011110111100001100001010010 (copy-paste) and then click Dec. This will give you the decimal equivalent of the 32 digit binary number = 1138628690

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Step 4: Go to your browser and in the address bar type http://1138628690, this should open http://techpp.com, but it doesn’t, reason given below.

Imp: You might have observed that http://1138628690 is giving Bad Request error. This is because the above trick doesn’t work for websites running on virtual hosts. But other sites like Google, Gmail etc will work flawlessly (http://1249729384 or http://3512041827/)

I do not claim to be an expert in this, so feel free to share your knowledge, tips, tricks and hacks to perfect this method. Did this work for you?


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Founder-Editor

Raju is the founder-editor of Technology Personalized. A proud geek and an Internet freak, who is also a social networking enthusiast. You can follow him on Facebook and on Twitter. Mail Raju PP. Follow rajupp