Programs typically allow you to choose from a multitude of predefined categories to restrict from, in addition to giving you the ability to block specific sites. One downfall of site blocking is that it has the tendency to restrict more sites than originally intended. However, applications that query databases of URLs or discriminate by content generally make fewer mistakes than when using key word blocking alone. If you think that site blocking may become hindering, don't fret. Just because your company implements site blocking filters doesn't mean that it has to affect web surfing at all hours.
Passwords can provide authorized users with different levels of Web access.
You'll also need to think about what type of application to get. With the older client-based filtering software, the application must be installed on each computer individually. In contrast, server-based filtering occurs at a centralized location like a server, so that sites can be blocked even before they reach the computer. Internet filtering software can be found at a computer store. Free upgrades are usually available for at least a year.