This parameter controls the smallest port number UDP can select as an ephemeral port. An application can use an ephemeral port when it creates a connection with a specified protocol and it does not specify a port number. Ephemeral ports are not associated with a specific application. When the connection is closed, the port number can be reused by a different application.
Port number
32,768
1,024 to 65,535
Yes
When a larger ephemeral port range is required.
Unstable