Netscape ENTREPRISE SERVER 6.1 - 04-2002 ADMINISTRATOR Administrator's Manual page 146

Adding Variables
Click OK.
7.
The variable must also be added to the server's configuration file you are
transferring to the slave. For example:
SERVERPORT $Port
You can set variables with different values for each slave in the configuration file.
Once added, variables can also be edited and deleted using the drop-down Option
list in the Add Variables page.
146 Netscape Enterprise Server Administrator's Guide • April 2002 (Draft)
if port was the variable added.