IPsec from a router behind a firewall

[jammers77]

Hi,

I have a router (with private ip only) that is behind a firewall. The firewall will provide NAT for the router. I would like to set up a VPN from this router to another router that does have an external IP. Are there any docs on setting up a ipsec vpn on a router that uses a private IP which is nat'ed on a firewall?

Router A -> (INTERNET) -> FW      -> Routerb

external IP                         NAT         private IP

I have the peering set up with the external IP from router A and the Nat'd IP on FW.

At this point, I am getting an MM_NO_STATE.

Thanks,

MS

[Jennifer Halim]

Here is a sample configuration on what you are trying to achieve:

http://www.cisco.com/en/US/tech/tk583/tk372/technologies_configuration_example09186a0080094ecd.shtml

Hope that helps.

[sean_evershed]

Thanks Jennifer, +5.

That's a useful reference, I may need it one day.

Cheers

Sean

[Jennifer Halim]

Cheers Sean..