[FreeNX-kNX] network topology problem

[Cedric Briner]

hello,
we have such network topology:

 laptop(lin,osx,win)
  |
  |
  |
 internet ---(public )----solaris
                (network)   front-end
                                  node
                                    |
                                    |
                (private network 10.)
                                    |
                                    |
          -------------------------------------
          |           |          |                     |
         sun1    win      debian1          debian2
         node    node   freenx-server  freenx-server
                                node                node


and the front-end node has a minimum of services (sshd).

How can we achieve that the laptop can use a freenx-server without
a vpn?

Is there any stuff to do with port forwarding or nat/firewall or ...

thanks in advance for your help.

Ced.