Figure 33-15 Menu 21.1.6.1 Sample Filter - ZyXEL Communications PRESTIGE 652H User Manual

Step 4. Press [ENTER] at the message
21.1.6 — Filter Rules Summary.
Step 5. Type 1 to configure the first filter rule. Make the entries in this menu as shown next.
When you press [ENTER] to confirm, the following screen appears. Note that there is only one filter rule in
this set.
Filter #: 6,1
Filter Type= TCP/IP Filter Rule
Active= Yes
IP Protocol= 6
Destination: IP Addr= 0.0.0.0
Source: IP Addr= 0.0.0.0
TCP Estab= No
More= No
Action Matched= Drop
Action Not Matched= Forward
Press ENTER to Confirm or ESC to Cancel:
There are no
more rules to
check.
Select Drop here so that the
packet will be dropped if its
destination is the telnet port.
Filter Configuration
Press [ENTER] to confirm or [ESC] to cancel" to open Menu
"
Menu 21.1.6.1 - TCP/IP Filter Rule
IP Source Route= No
IP Mask= 0.0.0.0
Port #= 23
Port # Comp= Equal
IP Mask= 0.0.0.0
Port #=
Port # Comp= Equal
Log= None

Figure 33-15 Menu 21.1.6.1 Sample Filter

Prestige 652 Series User's Guide
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 the telnet
service (TCP protocol) is 23. See
Select Equal here
RFC-1060 for port numbers of well-
as we are looking
known services.
for packets going
to port 23 only.
Select Forward here so that the packet will be forwarded if
its destination is not the telnet port and there are no more
rules in this filter set to check. Select Next if there are
more rules to check.
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