Not a port of call, not port wine, but computer ports!
A colleague of mine tracked this down on the microsoft site.
To ensure that your Oracle Listener or SQL Server database starts correctly, you want to avoid other software starting up and grabbing the port needed by Oracle or SQL Server. In my shop, we’ve seen backup software, among others, grab a port and then prevent SQL Server from starting.
Here’s the link on how to do this:
It involves making a registry edit to the key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters and then adding a new ReservedPorts. The port numbers added here will only be used if specifically requested by software.
This will not prevent conflicts if you configure two separate programs to request the same port. But it will save you from Windows automatically assigning the port number in question to software that did not specifically request a port.