NAT configuration

[ket14pril14]

Hi everybody!

I am trying to make NAT configurations on the following topology:

After reading various articles and watching some tutorials, I seemed to have finally found a way to make configurations using following inputs:

However, Simple PDU checks have failed and I noticed that outside local and outside global addresses are not shown. I will be grateful for any suggestions on how to fix this

[M02@rt37]

Hello @ket14pril14 

It should be

ip route 20.0.0.0 255.255.255.128 129.55.18.2, no ?

[Giuseppe Larosa]

Hello @ket14pril14 ,

you have configured static source nat entries this is why you don't see anything under Outside local and Outsid global this is not an issue.

Where is defined your public IP subnet 10.0.0.0/25?

  your network diagram shows a serial with a different IP 129.55.18.1/30  you can nat to it .

Edit:

M02@rt37 is spot on your static route should be referring to the remote public subnet 20.0.00/25 not your local one

Hope to help

Giuseppe

[ket14pril14]

Yes, you are right  subnet 10.0.0.0/25 is defined nowhere. I didn't particularly understand what you meant by  "IP 129.55.18.1/30  you can nat to it".  Did you mean the following natting?

The first router:

The second router:

[Giuseppe Larosa · Accepted solution]

Hello @ket14pril14 ,

>> Yes, you are right  subnet 10.0.0.0/25 is defined nowhere. I didn't particularly understand what you meant by  "IP 129.55.18.1/30  you can nat to it".  Did you mean the following natting?

You could use a trick like adding 10.0.0.0/25 as a secondary address on the serial interface

int serial0/0/0

ip address 10.0.0.1 255.255.255.128 secondary

Alternatively you can create a loopback interface

int loopback 10

desc used for NAT

ip address 10.0.0.1 255.255.255.128

no shut

this to be able to use your previous NAT commands

Hope to help

Giuseppe

[ket14pril14]

Thank you very much for all the suggestions