$ sudo /usr/bin/system-config-firewall※ iptable だけは、コマンドで設定は勘弁
$ cat /etc/gdm/custom.conf # GDM configuration storage [daemon] [security] AllowRemoteRoot=false [xdmcp] Enable=true [greeter] [chooser] [debug]
$ Xephyr :1 -query 192.168.1.2 -screen 800x600 -kb