[FreeNX-kNX] Reverse Connection with FreeNX

[Les Mikesell]

Terje Andersen wrote:
>
>  >
>  > I'm looking for your help, I need to make a reverse connection with 
>  > FreeNX, like the reverse connection of VNC that the server connects 
>  > to the client and the connection is succeful, no router or firewall 
>  > configurations, can it be made? how?
>  >
> 
> I won't say that it's impossible (nothing is impossible in the Open 
> Source world :p), but I can't see any easy way of accomplishing this.
> 
> VNC uses (AFAIK) a rather simple authentication mechanism, but the NX 
> technology uses SSH (with pub/priv key) + user&password. "Reversing" 
> this mechanism doesn't look (to me) to be a simple task. You would also 
> need to make a custom client (look at the FreeNX Client QtNX for GPL'ed 
> code) that would accept the connection from the server.
> 
> Maybe I'm looking all wrong at this; a simple program (on the server) 
> could send a special command to a custom client with info about the 
> server/IP that it (the custom client) should initiate a connection to. 
> That might be a more probable workaround to it...


The straightforward way would be to establish a vpn connection, perhaps 
with openvpn, going whichever direction works best through the firewall. 
  Slightly more convoluted, but perhaps easier to accomplish would be a 
port-forwarding ssh connection established one direction, with the 
freenx client using the forwarded port to connect back.

-- 
   Les Mikesell
    lesmikesell at gmail.com