ZyXEL 791R 91-004-247001B Manual Do Utilizador

Prestige 791R G.SHDSL Router 

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.

Select Drop here so that the 

packet will be dropped if its 

destination is the telnet port. 

There are no 

more rules to 

check.

Select Equal here 

as we are looking 

for packets going 

to port 23 only. 

The port number for the telnet 

service (TCP protocol) is 23. See 

RFC-1060 for port numbers of well-

known services. 

6 is the TCP protocol. 

Select Yes to make the rule active. 

Press [SPACE BAR] to choose this 

filter rule type. The first filter rule 

type determines all subsequent filter 

types within a 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 #=  

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: 

 

After you have created the filter set, you must apply it. 

Step 1.  Enter 11 in the main menu to display menu 11 and type the remote node number to edit it. 

Step 2.  Go to the Edit Filter Sets field, press [SPACE BAR] to choose Yes and press [ENTER]. 

 

 

Filter Configuration 

 

12-19