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.
A short NAT (Network Address Translation) description based on AR1200 documentation:
Huawei AR1200 supports the following NAT features: static NAT, port address translation (PAT), internal server, NAT Application Level Gateway (ALG), NAT filtering, NAT mapping, Easy IP, twice NAT, and NAT multi-instance.