ZyXEL Communications Prestige 642M series Podręcznik Użytkownika Pobierz pdf (Strona 23)

Prestige 642 ADSL Internet Access Router

8-18 Filter Configuration

Figure 8-13 Example Filter – Menu 21.3.1

When you press

[ENTER]

to confirm, you will see the following screen. Note that there is only one filter

rule in this set.

Menu 21.3.1 - 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 S

ace Bar to To

le.

Press the [SPACEBAR] 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.

is the TCP protocol.

The port number for the telnet

service (TCP protocol) is

See RFC 1060 for port numbers

of well-known services.

Select

Equal

here as we are

looking for

packets going to

port 23 only.

There are no

more rules to

check.

Select

Drop

here so that

the packet will be

dropped if its destination

is the telnet port.

Select

Forward

here so that

the packet will be forwarded

if its destination is not the

telnet port.

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