This is for wwindows users only, and is a method of using the operating system itself to achieve what most commercial porn blocking software achieves, but with no need to buy any software at all. Full instructions here http://www.ericphelps.com/security/pac.htm non-experts will find this extremely easy to install and will pick up how to use it in no time at all - using this method in conjunction with the hosts file can make an immesurable difference for the better in favour of your security online download this zip file which contains a text file called "proxy" and a help file http://www.ericphelps.com/security/pac.zip For firefox users Heres how easy it is to use other browser users need to see the help file just take a look at the file and you will see it becomes easy to understand and by using first part and last part blocks you can make the blocks even more subtle and refined so you let ok stuff in and keep bad stuff out full instructions here http://www.ericphelps.com/security/pac.htm This method can and should be used in conjunction with the hosts file method of blocking, the the hosts file is rather crude compared to the script at erichelps.com. This is called a false proxy method What this does is allow you to block based on a more refined methodology than the hosts files - its completely transparent open source code and can save you a lot of time and money
I am looking for better scripts and improvements to this script at the moment to research this subject yourself you are looking at PAC files (Proxy Auto Configuration) and content blocking
You can also use the HOSTS file to block out certain sites. http://www.accs-net.com/hosts/what_is_hosts.html