Hi every body.
Let say we want our nat router to change destination ip for packets received on its f0/0( ip nat inside) interface from h1. The network is topology is as follows:
h1---------f0Rs0------internet
The goal is every time router receives a packet destined for 10.10.10.10 from h1, router must change the destination ip to 200.200.200.1
Our routing table at R:
C 199.199.199.0 f0/0
S0 100.100.100.0/24
S* 0.0.0.0 0.0.0.0 100.100.100.2 ( pointing to default gateway at ISP)
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Our router config:
access-list 10 permit 10.10.10.10 0.0.0.0
access-list 10 permit any
ip nat pool zee 200.200.200.1 200.200.200.1 netmask 255.255.255.0
ip nat inside destination list 10 pool zee
f0/0
ip nat inside
s0/0
ip nat outside
Now the question is what will router do? will it perform ip look-up first for destination ip then perform nat for packets destined for 10.10.10.10 on f0 ( ip nat inside) interface? If yes, then router will simply drop packet as destination 10.10.1 is not in its routing table. correct? if correct then how could we establish communication in such case.?
Note:
In last thread, i learned that if a router ,configured with " ip nat inside source" command, receives a packet on its " inside interface" ( the interface configured with ip nat inside command), router perform ip look up first than nat. Will a router configured with " ip nat inside destination " command will still behave identically on its " inside interface" i.e will router perform ip look up first then nat ?
thanks and have a great weekend
Thanks and have a great weekend
