What does it mean outbound NAT?
Outbound NAT translates the source IP addresses of packets sent from a high-priority security zone to a low-priority one.
I allowed myself to post a flowchart of configuring intranet users to access extranet through NAT (from Huawei documentation):
It easily lets us to choose a suitable way of configuring outbound NAT. In this lab I will try to do a review of these methods.