RHEL 3, 4, 5, 6 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 (Red Hat 7, 8, 9, RHEL 3)
/etc/gdm/custom.conf (RHEL 4, 5, 6, If the file does not exists, create one)
```
[xdmcp]
Enable=true
```
Configure KDM
If you are using gdm, you can skip this step.

1. If you are using RHEL 4 or later release, skip this step. Otherwise, open /etc/X11/xdm/xdm-config and comment out the "requestPort" option as following:
```
DisplayManager.requestPort: 0
==>
!DisplayManager.requestPort: 0
```
2. Open /usr/share/config/kdm/Xaccess and remove the initial "#" character for the following line:
```
#* #any host can get a login window
==>
* #any host can get a login window
```
3. Open /usr/share/config/kdm/kdmrc and set the Enable entry to true in the [xdmcp] section as following.
```
[xdmcp]
Enable=true
```

# init 3; init 5