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Issue with NAT PAT configuration

Hi,

 

Can I kindly ask your help with NAT PAT configuration done in Packet Tracer?

 

Configured NAT PAT on R2, and as soon as it is configured, no ping goes between inside and outside network. All routers know routes to each other, and all ping commands went fine before the configuration was deployed. Did I miss something important to complete the configuration? 
Attaching network topology and R2 NAT PAT configuration. Please tell me if you need more screenshots to understand the issue, I am very new in networking and that is my first post on Cisco Community.

 

Thank you in advance!

8 Replies 8

balaji.bandi
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as per your NAT statement, you have only 2 Host in the ACL 1 (is this what you intended to do ?)

or whole VLAN required to be NATtted while going to another network?

 

change your access-list 1 accordingly.

 

BB

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Thank you for your reply.

Yes, NAT PAT was intended only for server and laptop in the right network. To test the configuration, pinged from both of them to the left network, and all packets are lost.

 

If it was working before you applied NAT then that means all routers must have routes for the 170.1.0.0/16 network (or using default routes).

 

Once you applied NAT all routers now need to know how to reach the 11.0.0.0/8 network which obviously R1 and R2 know about but does R0 know about that network ? 

 

Jon

Thank you for replying.

 

Yes, R0 know the path as well and ping goes to 11.0.0.0/8.
Here is the screenshot from R0

TJ-20933766
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Is the IP address of Server0 and Laptop0 170.1.1.1 & 170.1.1.3?

Are their default gateways 170.1.1.2?

Can either of them ping 11.1.1.1?

Thank you for your response.
Yes, server's IP is 170.1.1.1, laptop's - 170.1.1.3 and their default gateway is 170.1.1.2
It is strange, but both hosts can ping 11.1.1.1, however cannot ping 200.1.1.151 (IP of R0). At the same time, R2 can ping R0, and vice versa.
Attaching screenshots.

Where does 200.1.1.151 live? Since this is packet tracer, could you please just upload the topology so we can mess around with it? Be sure to provide any passwords required to log into the devices.

Zipped the whole Packet Tracer file, hope it will be accessible.

There are no passwords on routers, so everything should be visible

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