Figure 8-15 Sample Filter — Menu 21.3.1 - ZyXEL Communications PRESTIGE 650H-13 User Manual

Prestige 650H ADSL Router
Step 4. Press [ENTER] at the message
21.3.1 — TCP/IP Filter Rule.
Filter #: 3,1
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.
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.
8-18
Press [ENTER] to confirm or [ESC] to cancel" to open Menu
"
Menu 21.3.1 - 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= None
Log= None
Figure 8-15 Sample Filter — Menu 21.3.1
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.
Filter Configuration