Remote Desktop / Administration

If I use VNC to the SLES SAP from internal IP I can see the mouse movement on the server, BUT if I use VNC from external IP such as from wifi hotspot ro remote location I can’t see any movement on the server screen so I can’t see what other user doing with my server. How to set the VNC options so I can see what other user do when they remote my server.

Thanks

Could be your connection is just too slow ?