To secure your Exceed onDemand session, you can make use of the Host ACL (Access Control List) file and the User ACL file. Together, these methods let you selectively restrict access to your Exceed onDemand session at the host and user levels.
The Security page of the Xconfig dialog box contains the following settings:
Host Access Control List With the host ACL file, you can configure your Exceed onDemand session to accept X applications only from hosts specified by you.
User Access Control List This file lets you enable security at the user level (rather than the host level) without using XDMCP. With the user ACL file, you can configure Exceed onDemand Desktop to accept only those X applications that were started from host logins/accounts specified by you.
If an X application tries to connect to the X server in a non-XDMCP startup mode, authorization is granted as follows: