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Want to block porn or any illegal web content 
from yours home or Office system .If yes then you can do this by following simple steps mention below .This trick will really helpful for all those parents who wants to block myspace ,Facebook ,Orkut ,Youtube or any other website from there home computer in order to restrict there children to surf all those websites.
For Blocking any website (Like orkut,youtube,playboy,myspace,facebook) in which you dont want yours friends Family members etc to visits etc you have to follow below steps carefully.
- Click the Start button and select Run. Now type the below text in Run box:
notepad c:\WINDOWS\system32\drivers\etc\hosts
- A New notepad window will open on your screen containing some Information. Just goto the last line of the file, hit the enter key and type the following:
- Save the file and exit. You are done. Now None of the above websites will open on yours computer you can block as many websites as you like using above trick.
127.0.0.1 Facebook.com
127.0.0.1 Playboy.com
127.0.0.1 Myspace.com
If you want to remove the banned website, open the same file as mentioned in 1st Step and delete the blocked website .This is a very easy and free of cost trick to block any website. 
I followed the instructions on how to block websites. When I went to check and typed in youtube.com I got a blank page.Wonderful! But when I went to google.com and typed in YouTube and the search results came up and I clicked on the link, it brought me to the site even though I blocked it. What happened and what do I do?
f you really want an effective way of blocking sites. Use a different DNS service like Open DNS that has built-in blocking. If you add it to your router then every machine will be blocked on your network. If you have a single machine, you can add it to your DNS server list in your internet options on your computer. You can even track access as well if you enable that function.
How do I know if I am logged on as the administrator, I followed the instructions however facebook, myspace and bebo still open and how to block orkut in IE, Mozilla firefox and in google chrome….
Parents, here is what you do: Filter the IP addresses of the offending website in the router (look up the IP addresses using for example using ‘nslookup link ‘) and have a passwd to access the router.