centos 6.6 配置xdmcp远程桌面

1.首先安装 xdm软件：yum install xdm
vi /etc/X11/xdm/Xaccess:
* allow
 
vi /etc/gdm/custom.conf:
[security]
AllowRemoteRoot=true
 
[xdmcp]
Enable=true
Port=177