As a system administrator, you might find it useful to block internet access for certain users

and / or machine, but in many cases, you do want to allow access to several specific web sites.

This article shows an alternative way of doing it without using ISA, Firewall applications,

IPSec and other complex solutions.

The first thing you want to do is create a simple HTML document which says

'Internet access is forbidden… blah blah blah'.

You can use MS Word or simple Notepad to create such HTML file and save it somewhere

under the name 'Default.htm'.

The next step would be to publish this HTML document on one of your IIS servers.

You should use a dedicated web site which listens on some unused TCP port for this.

You can use any IIS server (or other OS) for publishing the HTML document.