Chapter 6 Packet Filter; Add A Packet Filter Entry - Paradyne 1740 SHDSL User Manual

CHAPTER 6
Packet filter, a firewall security measure, examines incoming and outgoing packet headers (IP address,
port number, and so on) on the network and determines whether to forward the packets based on user-
defined rules (deny, accept, and count).
The SHDSL router provides packet filter and stateful packet inspection. It has denial of service protection
against attacks such as ICMP Flood, Ping of Death, IP spoofing, Port Scans, Land Attacks, Tear Drop
Attacks, IP Source Route and WinNuke Attacks.
To access the packet filter functions, select Packet Filter from the advanced menu. The screen will
display as below, showing a list of the currently configured filter entries.
6.1.1

Add a Packet Filter entry

To add a Packet Filter, complete the following steps:
STEP 1: Click on the Add button, the Packet Filter Add screen will appear.
STEP 2: Enter values for the parameters (explained below).
STEP 3: Click on the Apply button at the bottom of the page.
Priority
Protocol
Source IP
Source Mask
Source Port
1740-A2-GB20-00
Packet Filter
You can enter a number here to assign the priority of a filter, in
case there are overlapping rules. The lower the number the higher
its priority.
Select from TCP/UDP/ICMP/IP.
Source IP of a packet you wish to filter.
Source Mask of a packet.
Source Port of a packet you wish to filter.
July 2004
1740 SHDSL 2/4-Wire Router User's Guide
37