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Beginner

Question related to NAT/TCP

Hello all,
I have a 'public' network connected to a 'private' one. Two routers, configured as main/backup, interconnect the private and public networks.
To allow a specific private host to go on the public network, I configured a static nat on the interconnection routers:
interface <to_private_network>
  ip nat inside
interface <to_public_network>
  ip nat outside
ip nat inside source static <private_ip> <public_ip>
I have now a weird result.
UDP-based applications (like snmp) are ok but TCP-based applications (like telnet ou https) are not.
The nat works correctly but the connection stopped after the nat.
Have you ever seen such a behaviour before?
Regards,
Jean-Baptiste
Everyone's tags (3)
2 REPLIES 2
Highlighted
Beginner

Re: Question related to NAT/TCP

Hi,

     Can you share your config file.

BR.

Muammer

Highlighted
Advisor

Re: Question related to NAT/TCP

Hi,

and also your topology.

But to get nat working with a redundant setup like yours you must use stateful nat(SNAT).

http://www.cisco.com/en/US/docs/ios/12_2t/12_2t13/feature/guide/ftsnat.html#wp1051530

Regards.

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