[gb-users] NAT and SSH tunnels.

[Scheldebouw]

Hello,

Does NAT at either or both sites of an SSH tunnel "corrupt" the packages?
I'm trying to setup the VNC/SSH combination to access a management PC on the internal network from administrator's home machines over the Internet. VNC is a free and multi platform PCAnywhere like application (realvnc.com) that uses TCP 5900.
I've tested the setup from the internal network so I know SSH and VNC are setup correctly on the management PC. I've setup a tunnel for SSH (and also for VNC for testing direct connections without SSH) and a remote access filter for both.
From the home machine, that uses GNATBox lite, I can SSH to the management PC and directly connect with VNC as well, but if I try to tunnel trough SSH (ssh -L 5901:GNATBOX-EXTERNAl-IP:5900 username@GNATBOX-EXTERNAl-IP) I cannot get a VNC connection to "localhost:1" (the command "vncviewer localhost:1" will connect to the local 5901 port thats get tunneled by SSH to port 5900 on the management PC).
So, does NAT at either or both sites of an SSH tunnel "corrupt" packages or do I have to look elsewhere?

Thanks!

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