CentOS 4.x, 5.x, 6.x XDMCP Configuration

1. Display manager configuration

Change runlevel to 5
Open/etc/inittab and set the initial runlevel to 5 as following:
```
id:5:initdefault:
```
Configure GDM
If you are using kdm, skip this section and go to 'Configure KDM' section below.
Open the following GDM configuration file and set the Enable entry to true in the [xdmcp] section:

/etc/X11/gdm/gdm.conf (CentOS 4)
/etc/gdm/custom.conf (CentOS 5, 6, If the file does not exists, create one)
```
[xdmcp]
Enable=1
```
Configure KDM
If you are using gdm, you can skip this step.

Open /etc/X11/xdm/Xaccess and remove the # character in front of the line:
```
#* #any host can get a login window ==>
* #any host can get a login window
```
Then, find the [xdmcp] section in the /etc/kde/kdm/kdmrc file and set Enable to true like the following example:
```
[xdmcp]
Enable=1 (or 'true')
```

# init 3; init 5