X11 Forwarding Through Google Colab

x11 forwarding through Google Colab

tl;dr

1. Open 6000/tcp port on your router and firewall
2. Install VcXsrv
3. Run "XLaunch" with "Disable access control"
4. Run "!apt-get install x11-apps && export DISPLAY=YOUR_IP_ADDRESS:0.0 && eyes" on Colab

Check

1. Google Colab does not keep environment variables across code cells. So you should set DISPLAY variable each them.

2. Xming may disallow remote connection as a default setting. At least, VcXsrv do that. Try to disable access control. This is an insecure option.

3. Router and firewall must open 6000+n/tcp port. The n is display number counting from 0. (e.g. HOSTNAME:0.0 → n=0)
   Open Port Check Tool - Test Port Forwarding on Your Router
   

forwarding x11 by SSH.NET c# library

I found the solution:

 SSHInstance = new SshClient(HostOrIP, Port, Username, Password);
 SSHInstance.Connect();
 streamSSH = SSHInstance.CreateShellStream(ShellID, 1, 0, 0, 0, 2000000);

 ForwardedPortRemote forwardedPortRemote = new ForwardedPortRemote(6000 +X11ServerDisplay, HostOrIP, 6000 + X11LocalDisplay);
 SSHInstance.AddForwardedPort(forwardedPortRemote);
 forwardedPortRemote.Start();

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