NAT and webcashing

["snaqi" <snaqi () gbnets com>]

Hi,

Current Config:

ISP----->Router(With NAT and static IP)---->Hub / Switch ---------> 25
Workstations (Peer to Peer Network)

I want to implement WebCashing in my organisation.

Q: What is the relationship between NAT and WebCashing?
Q: How can I run chatt applications and other dynamic sites to be stored in
webcash?
Q: Any url's for this solution using Linux?
Q: Any inexpensive hardware box that can do all?

Syed