ZyXEL Communications 310 set, here, Step, check, active, Select, looking for, There are no, Select Equal, port 21 only, more rules to, here as we are, will be checked

Prestige 310 Broadband Sharing Gateway

					Press [SPACE BAR] to choose
		Menu 21.6.1 - TCP/IP Filter Rule
		Filter #: 6,1			this filter rule type. The first
					filter rule type determines all
		Filter Type= TCP/IP Filter Rule
		Active= Yes			subsequent filter types within a
		IP Protocol= 6	IP Source Route= No		set.
		Destination: IP Addr= 0.0.0.0
		IP Mask= 0.0.0.0
		Port #= 21
		Port # Comp= Equal			Select Yes to make the rule
		Source: IP Addr= 0.0.0.0
		IP Mask= 0.0.0.0			active.
		Port #= 0
		Port # Comp= None
		TCP Estab= No			6 is the TCP protocol.
		More= No	Log= None
		Action Matched= Drop
		Action Not Matched= Check Next Rule
		Press ENTER to Confirm or ESC to Cancel:
Press Space Bar to Toggle.					The port number for FTP is 21.
There are no					See RFC 1060 for port numbers
				Select Equal	of well-known services.
more rules to
check.				here as we are
				looking for
				packets going to
	Select Drop here so that
				port 21 only.
	the packet will be
	dropped if its destination
	is the telnet port.
				Select Check Next Rule here
				so that the next rule in this set
				will be checked.

Figure 7-12 Example Filter — Menu 21.6.1

Step 6. Press [ENTER] to confirm and display the next screen. Note that there is only one filter rule in this set.

7-14 Filter Configuration