vi /etc/ssh/sshd_config
	# AddressFamily any
	AddressFamily inet
	...
	AllowTcpForwarding yes
	X11Forwarding yes
	X11DisplayOffset 10
	X11UseLocalhost yes
	...
:x
systemctl restart sshd
==== AUTHENTICATING FOR org.freedesktop.systemd1.manage-units ===
Authentication is required to manage system services or units.
Authenticating as: root
Password: ****
==== AUTHENTICATION COMPLETE ===
exit