You may wish to block porn sites for numerous reasons. The usual reason is to protect your children from having access to sexual sites. The easiest way to block porn sites is by using software designed to do just that.

You will find there are plenty of parental control programs available, what you should look out for is one which allows you to block porn sites specifically as well as a program which checks the sites currently being viewed and is able to block on an ad hoc basis.

You will find such ?p=articles/porn-filter/use-a-porn-filter-to-curb-his-porn-addiction" porn filter software will come with an extensive database of sites that are blocked and those that are considered safe. With lists of safe and unsafe sites you will find it incredibly easy to block porn sites.

You may want to block porn sites for your older children. With this the case you will want a program that is secure and can run in the background. This will prevent your child from fiddling with the program and turning it off. You may find a program refer to this as 'stealth monitoring'. If the software is open to everybody then it can easily be disabled and will no longer block porn.

The chances are your children will visit social networking sites, such as 'Facebook' or 'Myspace'. Doubtless they will use msn or other such service, email and probably visit chat rooms. With this the case you will certainly want a program that will monitor as you go and can keep an eye on such applications. It is quite easy for questionable content to piggyback in on these services.

If you want to block porn properly you will need to ensure whichever program you use has the following:

- Blacklist Websites

This will allow you to block specific sites or categories, when you become aware of a site you do not want your child using you can add it to the list. Every other site is allowed.

- Whitelist Websites

This will allow you to add specific sites or categories that are safe to a list and will block everything else. If it isn't on the list your child can not view it.

Whitelisting is seen as the ultimate form of blocking, you can in theory shut off the entire internet except for those few sites or categories you wish to allow.

- Ad hoc Website Monitoring

This will monitor each site your child attempts to visit as they go and will ban it if any questionable content is discovered. You can choose which content or words are considered unsafe.