Figure 7-12 Example Filter - Menu 21.6.1 - ZyXEL Communications Prestige 310 User Manual

Prestige 310 Broadband Sharing Gateway
Filter #: 6,1
Filter Type= TCP/IP Filter Rule
Active= Yes
IP Protocol= 6
Destination: IP Addr= 0.0.0.0
TCP Estab= No
More= No
Action Matched= Drop
Action Not Matched= Check Next Rule
Press ENTER to Confirm or ESC to Cancel:
Press Space Bar to Toggle.
There are no
more rules to
check.
Select Drop here so that
the packet will be
dropped if its destination
is the telnet port.
Step 6. Press [ENTER] to confirm and display the next screen. Note that there is only one filter rule in
this set.
7-14
Menu 21.6.1 - TCP/IP Filter Rule
IP Source Route= No
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 #= 0
Port # Comp= None
Log= None
Figure 7-12 Example Filter — Menu 21.6.1
Select Equal
here as we are
looking for
packets going to
port 21 only.
Select Check Next Rule here
so that the next rule in this set
will be checked.
Press [SPACE BAR] to choose
this filter rule type. The first
filter rule type determines all
subsequent filter types within a
set.
Select Yes to make the rule
active.
6 is the TCP protocol.
The port number for FTP is 21.
See RFC 1060 for port numbers
of well-known services.
Filter Configuration