ZyXEL Communications P-2301R/RL-P1C Support Notes page 24

Filter for blocking the web service
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Configuration
Before configuring a filter, you need to know the following information:
1. The outbound packet type (protocol & port number)
2. The source IP address
Generally, the outbound packets for Web service could be as following:
a. HTTP packet, TCP (06) protocol with port number 80
b. DNS packet, TCP (06) protocol with port number 53 or
c. DNS packet, UDP (17) protocol with port number 53
For all workstation on the LAN, the source IP address will be 0.0.0.0. Otherwise, you have to enter an IP
Address for the workstation you want to block. See the procedure for configuring this filter below.
Create a filter set in Menu 21, e.g., set 1
o
Create three filter rules in Menu 21.1.1, Menu 21.1.2, Menu 21.1.3
o
Apply the filter set in menu 4
o
1. Create a filter set in Menu 21
Filter
Set # Comments
------ -----------------
1 Web Request
2 _______________
3 _______________
4 _______________
5 _______________
Rule 1- block the HTTP packet, TCP (06) protocol with port number 80
Rule 2- block the DNS packet, TCP (06) protocol with port number 53
Rule 3- block the DNS packet, UDP (17) protocol with port number 53
Menu 21 - Filter Set Configuration
All contents Copyright (c) 2007 ZyXEL Communications Corporation.
Prestige 2301R/RL-P1C Support Notes
Filter
Set # Comments
------ -----------------
7 _______________
8 _______________
9 _______________
10 _______________
11 _______________
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