masquerading

1. networking "NAT" (Linux kernel name).

2. messaging Hiding the names of internal e-mail client

and gateway machines from the outside world by rewriting the

"From" address and other headers as the message leaves the

organisation.

This is good practise because external users do not need to

know about internal changes in message routing. The external

mail gateway needs to know how to route incoming replies back

to the original sender.

(1998-03-03)