Help needed with esxcfg-firewall command syntax/sample

Have problem with esxcfg-firewall  command syntax.  Appreciate if
anyone can give specific examples.


# esxcfg-firewall -o --openPort 280,tcp,in,HPSIMCert

I've tried replacing the commas (,) with space but it did not help.

Below is my example :

-e|--enableService <service>                    Allows specified service
                                                through the firewall.
-d|--disableService <service>                   Blocks specified service
-o|--openPort <port,tcp|udp,in|out,name>        Opens a port.
-c|--closePort <port,tcp|udp,in|out>            Closes a port previously opened
                                                via --openPort.
   --blockIncoming                              Block all non-required incoming
                                                ports  (default value).
   --blockOutgoing                              Block all non-required outgoing
                                                ports (default value).
   --allowIncoming                              Allow all incoming ports.
   --allowOutgoing                              Allow all outgoing ports.