When I try to export the remote display I do:
In my Ubuntu 17.04:
xhost + access control disabled, clients can connect from any host
Then I make the connection to the server:
ssh user@server
Once in the server get this error:
user@server:~$ export DISPLAY=my_ip:0.0 user@server:~$ xeyes Error: Can't open display: my_ip:0.0
My gdm configuration is:
root@my_ip:/etc/gdm3# cat custom.conf
# GDM configuration storage # # See /usr/share/gdm/gdm.schemas for a list of available options. [daemon] # Uncoment the line below to force the login screen to use Xorg #WaylandEnable=false # Enabling automatic login # AutomaticLoginEnable = true # AutomaticLogin = user1 # Enabling timed login # TimedLoginEnable = true # TimedLogin = user1 # TimedLoginDelay = 10 [security] DisallowTCP=false [xdmcp] Enable=true DisplaysPerHost=10 [chooser] [debug] # Uncomment the line below to turn on debugging # More verbose logs # Additionally lets the X server dump core if it crashes #Enable=true
GDM3 Version
gdm3 --version GDM 3.24.0
netstat -puta
Conexiones activas de Internet (servidores y establecidos) Proto Recib Enviad Dirección local Dirección remota Estado PID/Program name tcp 0 0 0.0.0.0:x11-1 0.0.0.0:* ESCUCHAR 1477/Xorg
ps fax | grep X
1211 tty1 Sl+ 0:01 | \_ /usr/lib/xorg/Xorg vt1 -displayfd 3 -auth /run/user/120/gdm/Xauthority -background none -noreset -keeptty -verbose 3 1477 tty2 Sl+ 0:35 \_ /usr/lib/xorg/Xorg vt2 -displayfd 3 -auth /run/user/1000/gdm/Xauthority -listen tcp -background none -noreset -keeptty -verbose 3
tcpdump
11:41:20.065425 IP server.41874 > my_ip.x11: Flags [S], seq 1478700027, win 29200, options [mss 1460,sackOK,TS val 22197350 ecr 0,nop,wscale 7], length 0 11:41:20.065447 IP my_ip.x11 > server.41874: Flags [R.], seq 0, ack 1478700028, win 0, length 0