Zyxel-communications P-335WT Manual do Utilizador descarregar pdf (Página 344)

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P-335 Series User’s Guide

344 Chapter 31 Filter Configuration

Figure 196 Example Filter: Menu 21.1.3.1

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.

• Select Ye s 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.

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