Port Blocking & URL Categorization

June 20th, 2010

A network administer may wish to stop users on his network from accessing certain kinds of sites.  For instance, if all of your users are spending a great deal of time on Facebook, then an administrator may wish to block this particular site or “social networking” sites in general.

Port blocking and URL categorization is a way to effectively accomplish this.  URL categorization creates a database of URL addresses and these can be classified in a multitude of ways.  Facebook, as an example, may be classified as “social networking.”   By using port blocking, the administrator could block all sites in the “social networking”category.  This would stop all visits to every site within that category (like MySpace) – and not just Facebook.

The limitation, of course, would be in any site that is not yet classified or is not classified within the “social networking” category.