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PAT & NAT

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ernestk

MIS
Joined
Apr 25, 2002
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3
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GB
Hi guys
first of all what is the big difference between PAT and NAT? and what is the best way to map an external public IP into my LAN. I am using NAT.
Regards
 
In basic terms NAT is a 1-1 mapping, PAT in 1-many mapping. The way the 1-many is achieved, using one IP address on the external interface, to associate a port on to an IP address & port combination on the inside interface. Simular to IP masquerading in the Linux world.

Hope that helps.
-Maddog
 
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