![]() ![]() Because the port number is encoded in 16 bits, the total number could theoretically be as high as 65,536 per IP address. PAT uses unique source port numbers on the Inside Global IP address to distinguish between translations. The number of application is very small that require 1-1 nat translation You would assign session to the second pool that cannot run in a PAT configuration. ![]() Build 2 pools one that you overload and a second you use the normal pool. Your best solution is to use a combination. It will end up being slightly less because it takes a while for the nat to timeout and be reused by a second user. ![]() In effect you can only have as many user active as you have public addressses. You can remove the overload but then you run the risk of not having enough addresses as they are allocted 1-1 for private addresses. In most cases unless you are run a huge number of sesssion it will never use anything but the first address. It can use the second address when the first is not technically 100% out of ports. This is a little more complex than this in that it has different pools for UDP and TCP ports. The way this is suppose to work when you use both pools and overload is that it will use the first address and use port on that address until they are exhausted. ![]()
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