A simple type of
proxy server filtering or monitoring. Either by matching a
domain or a word in a
URL, the software can block access or add to an alert
log file. For example, you could add
domains like "mp3s_for_free.com" to block the specific site or just add "
mp3" to block
any site with "
mp3" in its name or path. Even
http://www.mp3s-suck.com or
http://www.cnn.com/news/mp3/20010821.html would be blocked by filter, though, and so you see why
URL filtering is not usually a good idea for
blocking sites. Rather, it is better for monitoring - where someone can first look at the page to judge if it breaks the
organization's
internet access rules.
URLs were just for the example and have been faked