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Old 12-07-2008, 06:20 AM   #1
sulekha
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Question why NAT is not considered as a proxy server ?

Hi all,

why NAT is not considered as a proxy server ?

the reasons i know are

1 NAT is transparent to both source and destination hosts, but proxy server is not.

2 NAT is layer 3 protocol in contrast, a proxy server works at layer 4 or higher

is there any other reasons that i have missed????
 
Old 12-07-2008, 06:50 AM   #2
niknah
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A proxy server(at least a web one) will also cache some of the requests, reducing the bandwidth if you request the same thing again.

NAT is usually implemented in the IP stack, a proxy is usually a separate program in userspace.
 
  


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