Cerio CS-2224-14P User Manual page 39

 "negative" means the selected protocol will be dropped and other protocols will be
forwarded.
 "positive" means the selected protocol will be forwarded and other protocol will be
dropped.
Protocol: choose protocols which you want.

Secure WAN Port: choose secure ports which you want.

1. The secure WAN port should be set at the physical port which is
connected to the server.
2. Once this function is enabled, the switch will check the destination
TCP/UTP port number at the outgoing direction of the secure WAN port.
** If the condition matches, this packet will be dropped or forwarded.
3. The description of Secure WAN port is shown on the bottom of this
screen.
Click "Save" to confirm and finish the setting.