I have a situation in which I require to set-up IPSec tunnel in between two 1841 routers. This is normally two minutes job, in this case however one of the routers sits on a private LAN behind ADSL router (at the moment there is no reasonable way to get around it).
1841-1 <-> WAN <-> ADSL Router <-> 1841-2
FE0/1 Private LAN 172.16.1.1
FE0/0 Public IP
Private LAN1 192.168.0.1
FE0/0 LAN1 IP 192.168.0.1
FE0/1 LAN2 IP 172.16.0.1
172.16.1.0-172.16.0.0 require to communicate over the IPSec tunnel.
Could you please advice me on 1) what is the most practical way to set this up with out loosing sanity; and 2) Could you maybe point me to some documentation that deals with this specific scenario?