So you could have said -L 22590.ubuntu:5900, which would allow the ubuntu system to forward your tunnel traffic to a system that is only visible to the ubuntu system. The reason for localhost:5900 being passed to the ubuntu system is that ssh allows the ubuntu system to be a gateway to a 3rd system. The localhost:5900 pair are sent to the ubuntu system, where they are resolved. The first port number is the port for the client system's end of the tunnel (eg. You can choose any high numbered port as long as it is not a privileged port and does not steal a port that is currently in use on your local system. I choose the 22 to remind me it is associated with ssh, and the 590 to remind me it is related to the 5900 VNC port. NOTE: 22590 can be any port greater than the privileged port range. Or in Chicken specify Host: localhost, and port as 22590. I think the current privileged port range is 1-4096 (I could be wrong). Ssh -N -L 22590:localhost:5900 you were really using 1234, then you were most likely trying to use a privileged port without being root. I plan on using that as well in the future, but I want to learn how to use this as well as tunnel with ssh.

I know that you can basically do the same thing with TeamViewer (on iPhone too). I'm not sure if I tried logging in with sudo yet from the Mac terminal. I also tried to log into my administrator account and it was giving me the same error. I just can't do this over the internet tunneled over ssh. I also am able to connect with Chicken of the VNC over the local network. I have read through some other sites that say maybe I have to edit the ssh config file, but it doesn't seem clear if it applies in this case.Īnother thing is that I'm able to connect using Screen Sharing over my own network when at the dorm. My Ubuntu desktop is connected to a router, but I did open and enable ports. I tried disabling the firewall on my Mac as well as Little Snitch. Ssh -NL 1234:laptopmac:5900 try to connect on the localhost port using Chicken of the VNC, I get this:Ĭhannel 2: open failed: administratively prohibited: open failed I can ssh into from my mac fine using the Ubuntu IP address.

Basically I have an Ubuntu desktop running Maverick 10.10 with the Remote Desktop Preferences enabled to do remote administration. I'm doing this through a university network, so I guess there might be issues with that. I've read up on it and watched some tutorials.

I'm a bit of a noob here, so don't expect that I know everything about it here. I am attempting to tunnel a VNC connection over ssh.

Tunnel vnc through ssh