USER'S GUIDE - Ono

4
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FIREWALL
This chapter describes the screens that display when you click Firewall in the
toolbar.
4.1 FIREWALL OVERVIEW
This section describes some of the concepts related to the Firewall screens.
4.1.1 FIREWALL
The term “firewall” comes from a construction technique designed to prevent the
spread of fire from one room to another. Similarly, your CDE-30364’s firewall
prevents intrusion attempts and other undesirable activity originating from the WAN,
keeping the computers on your LAN safe. You can also use filtering techniques to
specify the computers and other devices you want to allow on the LAN, and prevent
certain traffic from going from the LAN to the WAN.
4.1.2 INTRUSION DETECTION SYSTEM
An intrusion detection system monitors network activity, looking for policy violations,
and malicious or suspicious activity. The CDE-30364’s intrusion detection system
logs all such activity to the Firewall > Local Logs screen.
4.1.3 PING
The CDE-30364 allows you to use the ping utility on the LAN (in the LAN > Debug
screen) and also on the WAN (in the Firewall > Firewall Options screen). For more
information, see Debugging (Ping and Traceroute) on page 40.
4.1.4 MAC FILTERING
Every networking device has a unique Media Access Control (MAC) address that
identifies it on the network. When you enable MAC address filtering on the CDE-
30364’s firewall, you can set up a list of MAC addresses, and then specify whether
you want to:
FIREWALL