I have previously written some articles/tutorials on How to access blocked websites at school/college/office/cyber cafes etc.
- 8 Innovative Ways to Access Blocked Websites
- UltraSurf – Access Any Blocked Site
- View Private Websites Safely at School/Work
- Top 5 Free VPN Services
- 10 More Free VPN Services for Anonymous Browsing
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
A new window opens. Type ping techpp.com and press Enter. You will see the IP address as shown below.
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.
Make sure ‘Dec’ is selected and enter the first number and select ‘Bin’. This would give you 8 digit binary value of 67 = 01000011.
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
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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November 30th, 2009 at 9:42 pm
Really a nice post…..you rock Raju
November 30th, 2009 at 10:47 pm
Great tip yaar.
I have twitted it.
November 30th, 2009 at 11:57 pm
thanks for your info
December 1st, 2009 at 1:12 am
Ya i know as it was shown by ankit fadia in what the hack.I knew it from there before it was posted here
December 1st, 2009 at 1:24 am
good! but did it work for you?
December 1st, 2009 at 5:06 am
Great post Raju would definately put it test..your the bomb
December 1st, 2009 at 10:21 am
Unfortunately this didn’t work for me. Our proxy says “Unable to determine IP address from host name for 1138628690″ ( i tried your example). I guess, if you are behind the proxy this trick may not work or your office network configuration also may matter.
December 1st, 2009 at 11:59 am
Its not about the proxy, but the method of blocking used. This would work if the admin has blocked the website based on the url name or keyword. Also, it has a better chance of working in Firefox.
December 1st, 2009 at 6:57 pm
I tried to open through the numeric URL, but firefox says it could not understand.
Am I Doing something wrong ?
December 1st, 2009 at 7:01 pm
Did you try the URL mentioned in the article (for techpp, google)? It should not give that error atleast, for techpp, it wont work as I mentioned, for Google, it must not give such an error
December 2nd, 2009 at 1:32 pm
Anybody tried rapidshare? Pl give opinion. I need rapidshare downloads behind corporate firewall
December 2nd, 2009 at 5:40 pm
U copied all dat stuff 4rm what the hack. HaHaHa.
December 2nd, 2009 at 5:45 pm
Great to know!! Mr Ankit spoke about converting URL to Binary, which isn’t enough and doesn’t work.
December 4th, 2009 at 7:23 am
Nice trick, but why that link doesn’t work on my browser? It seems a broken link.
December 12th, 2009 at 6:37 am
Raju, I mentioned about this post in my Friday Link Party http://www.niharsworld.com/2009/12/11/friday-night-links-party-11-december-2009/
Did you get the track back. Do let me know. Thanks.
December 12th, 2009 at 7:27 am
No Nihar. I didnt get. But thanks for liking and linking it
December 17th, 2009 at 6:47 pm
Nope doesn’t work in Dubai bcoz of Etisalat ISP
Please help more !!!
December 30th, 2009 at 8:19 pm
Gr8 tip…keep posting
January 1st, 2010 at 1:23 pm
keep posting on such useful things
February 16th, 2010 at 12:30 pm
how to i know ip address using mac???
February 24th, 2010 at 6:47 pm
not working if using OpenDNS.
simply use the ip address will do the trick.
April 7th, 2010 at 12:36 pm
At my work place Gmail is blocked. I tried this trick, but didn’t worked.
-Sriram
April 15th, 2010 at 12:54 pm
its not working for orkut.can it be work?
April 15th, 2010 at 1:00 pm
as mentioned in the first paragraph of the article, it all depends on how smart the network admin is. There is no guarantee that this trick works always.
May 19th, 2010 at 9:19 am
I have a problem my windows xp scientific calculator giving the wrong number. It gives me a 7 digit number. What can I do 4 this plz help me.
July 22nd, 2010 at 7:26 am
The calculation method above is clumsy.
If IP is a.b.c.d just do a*256^3 + b*256^2 + c*256 + d.
e.g.
67.222.24.82 =>
67*256*256*256 + 222*256*256 + 24*256 + 82 = 1138628690
August 1st, 2010 at 12:59 am