6.1. Concepts of Source NAT

6.1.1. Differences Between SNAT and Masquerading

Though SNAT and masquerading perform the same fundamental function, mapping one address space into another one, the details differ slighly. Most noticeably, masquerading chooses the source IP address for the outbound packet from the IP bound to the interface through which the packet will exit.

6.1.2. Double SNAT/Masquerading