In OpenBSD, you can use the sockstat command to list open TCP or UDP network ports. The sockstat command displays information about the sockets that are currently in use on the system, including the protocol (TCP or UDP), the local and remote addresses and ports, and the process ID and name of the process that is using the socket.
To list open TCP or UDP network ports using sockstat, you can use the following syntax:
sockstat -46 -p protocol
Replace protocol with tcp to list open TCP ports or udp to list open UDP ports.
For example, to list all open TCP ports, you can run the following command:
sockstat -46 -p tcp
This will display a list of all open TCP sockets, including the local and remote addresses and ports, and the process ID and name of the process that is using the socket.
Keep in mind that these are just general steps, and your specific configuration may vary depending on your system's setup. Consult the OpenBSD documentation for more detailed information.