The -Y flag enables trusted X11 forwarding, which does not enable the additional security extensions. The default -X flag enables X11 forwarding, but with extended security restrictions to protect LocalBox from malicious behavior of people on the RemoteBox. Sidenote on ssh -X and -Y: There are two ways of enabling X forwarding with SSH, -X and -Y. Another thing to check is “xhost”, which might also get in the way. Check if the RemoteBox allows X11 Forwarding (/etc/ssh/sshd_config should contain “X11Forwarding yes”), and try both the -X and -Y flag on the ssh command. ![]() ![]() If you got any errors and no window, most likely something fundamental is broken. If you got a terminal and a clock popping up in separate windows, you have working X11 forwarding over SSH.
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