ZyXEL Communications P-334WT Support Notes page 119

Rule 2- block the inbound FTP packet, TCP (06) protocol with port number 21
When two rules are completed, you can see the rule summary in Menu 21.1
IP Mask= 0.0.0.0
Port #=
Port # Comp= None
TCP Estab= No
More= No
Action Matched= Drop
Action Not Matched= Check Next Rule
Press ENTER to Confirm or ESC to Cancel:
Menu 21.4.2 - TCP/IP Filter Rule
Filter #: 4,2
Filter Type= TCP/IP Filter Rule
Active= Yes
IP Protocol= 6
Destination: IP Addr= 0.0.0.0
IP Mask= 0.0.0.0
Port #= 21
Port # Comp= Equal
Source: IP Addr= 0.0.0.0
IP Mask= 0.0.0.0
Port #=
Port # Comp= None
TCP Estab= No
More= No
Action Matched= Drop
Action Not Matched= Forward
Press ENTER to Confirm or ESC to Cancel:
Log= None
IP Source Route= No
Log= None