By default, the ZENworks Control Center has a 30-minute timeout value. If you leave the ZENworks Control Center idle on your computer for more than 30 minutes, you are prompted to log in again before continuing. You can increase or decrease the timeout value, or you can specify that the ZENworks Control Center never times out.
To change the timeout value:
Open the /var/opt/novell/zenworks/www/tomcat/base/webapps/zenworks/WEB-INF/config.xml file in a text editor.
Increase or decrease the timeout value, as needed.
or
Specify -1 to specify that the ZENworks Control Center never times out.
Save the config.xml file.
Restart the service by executing the following command:
/etc/init.d/novell-zenserver restart