ZyXEL p-334 사용자 설명서

Prestige 334 User’s Guide

Chapter 27 Filter Configuration

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Figure 142   Example Filter: Menu 21.1.3.1

• Select Yes from the Active field to activate this rule.
• 6 is the TCP IP Protocol.
• The Port # for the telnet service (TCP protocol) is 23. See RFC 1060 for port numbers of 

well-known services.

• Select Equal from the Port # Comp field as you are looking for packets going to port 23 

only.

• Select Drop in the Action Matched

 

field so that the packet will be dropped if its 

destination is the telnet port.

• Select Forward from the Action Not Matched field so that the packet will be forwarded 

if its destination is not the telnet port.

• Press [SPACE BAR] and then [ENTER] to choose this filter rule type. The first filter rule 

type determines all subsequent filter types within a set.

When you press [ENTER] to confirm, you will see the following screen. Note that there is 
only one filter rule in this set.

Menu 21.1.3.1 - TCP/IP Filter Rule

            Filter #: 3,1
            Filter Type= TCP/IP Filter Rule
            Active= Yes
            IP Protocol= 6      IP Source Route= No
            Destination: IP Addr= 0.0.0.0
                         IP Mask= 0.0.0.0
                         Port #= 23
                         Port # Comp= Equal
                 Source: IP Addr= 0.0.0.0
                         IP Mask= 0.0.0.0
                         Port #= 0
                         Port # Comp= None
            TCP Estab= No
            More= No             Log= None
            Action Matched= Drop
            Action Not Matched= Forward

Press ENTER to Confirm or ESC to Cancel:
Press Space Bar to Toggle.