Folks,

I need help with understanding network address translation.

I can understand that NAT allows the network administrators to create a
private addressing domain with all the internal addresses somehow being
mapped to external addresses.

This mapping between internal and external seems to take place:
*       Staticly, where one internal IP address is mapped to one external
address
*       Dynamicly, where all the internal IP addresses are mapped to a few
external addresses

My question is how often is the addressing done dynamicly, and if it is, how
can I have applications addressing hosts within my private addressing
domain, if the addresses are masked by NAT.

Your help would be much appreciated

Cheers

John
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