To configure multiple network listeners:
Define a unique host name for each network interface in your operating system’s host database.
In your interfaces file, use a text editor to add copies of the “master” line for your Adaptive Server, one for each additional interface you want the server to listen on.
Include a unique host name on each line to configure a network handler for each network interface.
Port numbers within the interface need not be the same, but they can be. They fall under the same rules for naming and numeric range as the primary network interface.