NAT OUTSIDE ISSUE

[wasincisco99]

Hi All Expert

I would like to make a lab with 3 router by NAT

This is a simple diagram , would like to NAT from R3 to outside local  IP to dummy IP such a 1.1.1.1

R1<---->R2<----->R3

And then NAT 1.1.1.1 global inside to whatever IP on local network .

Due to I don't want to advertise local IP from R1 to R3 i just need to advertise dummy IP to R3 only

I try to do lik this but it does not work .

Anyone can suggestion ?

[chrihussey]

Suggest posting the configs of the routers in order to provide the best solution.

[paul driver]

Hello

You can do this from R2 and have R3 as a internal network attached to R2 or apply the same configuration obviously changing the addressing to accommodate the internal network of R3 and it wan interface to R2

R2
int x/x
description wan facing R1
ip address 12.12.12.2 255.255.255.0
ip nat outside

int x/x
description LAN facing R3
ip address 23.23.23.2 255.255.255.0
ip nat inside

access-list 10 permit 23.23.23.0 0.0.0.255
ip nat inside source list 10 interface (wan interface) overload

R3
int x/x
ip address 23.23.23.3 255.255.255.0
description WAN facing R2

ip route 0.0.0.0 0.0.0.0 23.23.23.2

res
Paul

[wasincisco99]

Hi. Paul 

Thank you for you help but for the R3 i have only static routing to  dummy IP only and also advertising only Dummy IP to R1 

I could not add routing to from R3 to R1 subnet so i know if i added defualt routing as in your configuration it absolutely work . 

[paul driver]

Hello

Can you post the config of the 3 rtrs please

res
Paul