Difference between Port translation, Address translation and SNAT?

By the way, SNAT automap uses a configured self-IP for the translated source address. A SNAT pool is something you'd configure separately to contain a range of source addresses. One important and interesting note. These addresses are not load balanced. They are used in order until they reach port exhaustion. Each IP address is capable of supporting roughly ~65,000 concurrent TCP sessions. Keep this in mind if you do automap and have the potential to exceed that number of concurrent TCP sessions.