ssh-tunneling.markdown

@@ -8,6 +8,8 @@ ssh -A -t omi@omistack ssh -A -t computenode01
 The proxy located at your local machine tunnels the traffic to different machines. 
 You can access e.g. using a web browser the network as this machine/end point.
 
+You probably have to change the port from 9999 to any other port since multiple persons at the same time need to use their own port.
+
 ## Task: access as the control node
 ```
 ssh -ND 9999 omi@omistack