Can I ask some real novice management tier questions about the difference between a web filter such as Websense and a proxy server such as ISA server? I understand it’s common you use both, but what does the ISA server actually “do” in terms of staff’s internet access/activity? And what security issues/misconfigurations in ISA server can have an impact on user’s internet access? Please keep answers basic. Would much prefer some comments as opposed to links.