Re: NAT order of operations, why different?

Hi there,

This is what I understand about NAT, please correct

the idea is for the NAT Inside we have to know where's the packet is wish to go by looking up in the routing table; after that the NAT process take a place regarding the destination. In -> Out does routing looking before NAT translation lookup.

For the NAT Outside the router needs to know what's is the real destination before do an IP Lookup in it's routing table. Out -> In does NAT translation lookup before routing looking.

But if we'r using 'nat enable' the process will be the same...there's no more Outside/Inside NAT

-- 
dtw
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On Wednesday, January 5, 2011 at 7:40 AM, Tom Kacprzynski wrote:
> Hello,
> Just trying to figure out why they would make the order of operations of NAT
> different based on the direction where
> In -> Out does routing looking before NAT translation lookup.
> Out -> In does NAT translation lookup before routing looking.
> 
> Thank you in advance.
> 
> 
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