nnn.nnn.nn.nn is a valid IP address. By default, none is specified.
DefaultPortBindAddress is the IP addresses on the host system that the superserver should bind to. The superserver is the process that accepts client connections for ODBC, JDBC, and other connection technologies. Requests to the superserver port on other IP addresses on the host are not accepted. This makes it possible to limit connections to the superserver to a single address on a multihomed host.
If this property is not set, the superserver accepts requests on all IP addresses on the host. The default is to accept on all addresses.
Changing This Parameter
On the Startup page of the Management Portal (System Administration > Configuration > Additional Settings > Startup), in the DefaultPortBindAddress row, select Edit. Enter an IP address.
Instead of using the Management Portal, you can change DefaultPortBindAddress in the Config.StartupOpens in a new window class (as described in the class reference) or by editing the CPF in a text editor (as described in the Editing the Active CPF section of the “Introduction to the Configuration Parameter File” chapter in this book).