URL Filtering Protocol and how it works

respect sir,

thank u for u r kind reply.

my problem is how to establish communication between firewall and url filtering server.

any protocol is working between them.

D> > how it works any body knows it.

inappropriate

There are two predominate methods for URL filtering.

The first method and the most simple is to examine the URL being retrieved and compare it to a block list.

The second method is to visit the URL in question, examine the webpage/website for content and if appropriate, add the site to a block list.

The benefit of the first method is that ability to block inappropriate websites is instant however there is a high risk of having false positives. The benefit of the second method is that there is a far less chance of false positives, but the ability to block a website will not occur until the second attempt to visit the website in question.

Obviously the best approach is probably a combination of the two methods.