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New Member

Different Exit and Entry Interfaces and NAT


Am Facing a problem with NAT. I have a cisco 1841 router with a WIC 1 T on it. I have connected my laptop on to F0/1 which is configured with IP I have a DVB reciever connected on to the F0/0. There is a TX only Satellite link connected on to S0/0/0 to my ISP. The traffic to My ISP is on S0/0/0 and the return traffic is on F0/0.

I have to have access internet from my User Lan which is

I have configured an access list -

access-list 100 permit any any

I have configured PAT -

ip nat source list 100 interface s0/0/0 overload.

There is a valid and routable IP on s0/0/0.

Strangely when i give an extended ping from my router, using destination as any pingable Valid IP on internet and source as, i am getting a reply.

I am seeing IP NAT Translations also.

But when i am pinging from my Laptop which is configured with ip and Mask and gateway as i see the NAT translations on the router, i am not able to ping the same IP address.

Int S0/0/0 is configured with - ip nat outside

int f0/1 is configured with - ip nat inside.

Can some one assist me why i am not able to reach to internet from the invalid IP block altough NAT translations are happening and i am able to do extended ping and how to resolve this issue.

Thanks a ton for your kind help.

Thanks and Regards,

Vamsi Krishna

New Member

Re: Different Exit and Entry Interfaces and NAT

HI Guys...Just wanted to update you that the above mentioned problem was resolved by configuring - ip nat outside on F0/0.

Anyways, Thanks for your help.


Vamsi Krishna

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