Enabling remote X11 access

Tested with: Fedora 18 and 19

A. Enable overall access (Fedora 19 only)

Edit file:




/lib/systemd/system/initial-setup-graphical.service

Remove or comment out the daemon blocking argument, it should look like:

ExecStart=/bin/xinit /bin/firstboot-windowmanager /bin/initial-setup -- /bin/Xorg :9 -ac #-nolisten tcp

B. Enable at the display manager, in my case LightDM:

/etc/lightdm/lightdm.conf

Must include the following parameters under the following sessions:

...
[SeatDefaults]
xserver-allow-tcp=true
...
[security]
DisallowTCP=false
...

C. Restart the DM:

#---
systemctl restart lightdm.service
#---

D. Verify if it is up:

#---
netstat -nl | grep :6000
#---

Expected:
tcp 0 0 0.0.0.0:6000 0.0.0.0:* LISTEN
tcp6 0 0 :::6000 :::* LISTEN

E. Open up firewalld:

https://fedoraproject.org/wiki/FirewallD?rd=FirewallD/#Permanent_and_Temporary_Configuration

F. Add to connecting host:

#---
xhost +<remote host trying to use your X11>
#---

G. (On the remote host) Inform where the X11 is:

#---
export DISPLAY=<your running X11 hostname>:0.0
#---

H. (On the remote host) Test it:

#---
zenity --info --text="OK: `hostname`"
#---