Reverse Proxy for VNC

I’m attempting a setup where I can control a mac at the office from my Ubuntu laptop at home. This is complicated by the work network where simple dyndns & port forwarding are not an option.

Set up MacOS for Remote Management

From work machine:

Open Settings -> Sharing.

Enable Remote Management.

Go to Computer Settings... and enable VNC viewers may control screen with password.

Set up a password.

Set up Ubuntu desktop for SSH server access

I’m running Ubuntu at home on my laptop. I’ll need SSH running to support the reverse proxy.

sudo apt install openssh-server
sudo systemctl enable ssh

Set up Work machine via reverse proxy for SSH access

From work machine:

Note: I’ll need an ssh account on the remote machine.

Create a reverse SSH proxy opening port 22 on the work machine via 7000 on the remote.

ssh -R 7000:localhost:22 remoteuser@remotepc

To verify this is working, the remote machine can try to SSH to localhost 7000 and it should attempt to login to the work machine.

Set up SSH tunnel to allow VNC to reach work machine

From the remote machine:

Next, use ssh to proxy VNC’s ports

ssh -L 5901:localhost:5900 workuser@localhost -p 7000

Now, the remote machine should be able to open a VNC connection to localhost port 5901 and take control of the work machine.

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