1. Display manager configuration
• GDM (Ubuntu 10.10 and previous releases)
If you are using Ubuntu 11.10 or later releases, skip to the 'Configure LightDM' section.
Open the following GDM configruation file
Ubuntu 8.x: /etc/gdm/gdm.conf-custom or /etc/X11/gdm/gdm.conf
Ubuntu 9.1, 10.04, 10.10: /etc/gdm/custom.conf
and set Enable to 1 in the [xdmcp] section and DisallowTCP to false in the [security] section as following.
*Ubuntu 10.10 had a bug in its GDM (v 2.30.5) that only allowed IPv6 connections which caused Xmanager to fail connecting to the host. This bus was fixed in GDM version 2.32.0.
• Configure LightDM (Ubuntu 11.10 and 12.04)
If you are using Ubuntu 10.10 or previous releases, you can skip this part.
Create the /etc/lightdm/lightdm.conf file and save the following lines:
*In order to use Xmanager with LightDM, you must upgrade Xmanager to the latest release. Use the Help > Check for Updates menu to upgrade.
2. Firewall (TCP/UDP Ports) Configuration
Open UDP port 177 from the PC to the remote host direction.
Open incoming TCP ports 6000~6010 from the remote host to your PC.
3. Restart display manager and start Xmanager
• To restart gdm (gdm users only)
# init 3; init 5 (Ubuntu 8.x)
# /etc/init.d/gdm restart (Ubuntu 9.1, 10.04, 10.10)
• To restart LightDM
# service lightdm restart