You can use the esxcli software vib command to add to the system a third-party extension released as a VIB package. When you use this command, the VIB system updates the firewall rule set and refreshes the host daemon after you reboot the system.

Otherwise, you can use a firewall configuration file to specify port rules for host services to enable for the extension. The vSphere Security documentation discusses how to add, apply, and refresh a firewall rule set and lists the esxcli network firewall commands.