Using tunnels +Cisco/Netopias and openswan for remote admin

Hi All

Just sorting out whether or not this tool is able to do what i need.

I have several smallish lans behind nat/firewall routers. (cisco and netopia). i wish to create tunnels to my linux server (using openswan) and then manage the systems inside the nat/firewall with snmp and discovery etc via the tunnels. i do not want to open ports on the routers - as i want to manage them with snmp... and besides there are too many devices inside.

is anyone doing this.

so

192.168.25.0/24 <> internet IP <> server public Ip > internal ipsec address space

OpManager would then be able to "see" iniside the natted server.

any one got any comments...

ash