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OK,

We have a router on the outside with a address of 172.31.*.*/24 and on
the inside we have 10.1.2.*/24, the inside needs access to anything on
the outside. We as the outside needs access to 1 server on 1 address
10.1.2.*/24.

The solution we have is: NAT the 10.1.2.*/24 to an address on the
outside of the router 172.31.*.* and NAT the whole of the inside to 1
address on the outside overloaded "BUT" we can't seem to figure out
how to NAT/Configure it to work correctly.

Cheers,

Ry.

Ry wrote:
> OK,
>
> We have a router on the outside with a address of 172.31.*.*/24 and on
> the inside we have 10.1.2.*/24, the inside needs access to anything on
> the outside. We as the outside needs access to 1 server on 1 address
> 10.1.2.*/24.
>
> The solution we have is: NAT the 10.1.2.*/24 to an address on the
> outside of the router 172.31.*.* and NAT the whole of the inside to 1
> address on the outside overloaded "BUT" we can't seem to figure out
> how to NAT/Configure it to work correctly.
>
> Cheers,
>
> Ry.
>


If your server on the inside is 10.1.2.1 and you use 172.31.1.1 to
address it from outside then your nat config is thus -

ip nat inside source list 1 interface <inside int> overload
ip nat inside source static 10.1.2.1 172.31.1.1
access-list 1 permit 10.1.2.0 0.0.0.255