ZyXEL ZYWALL IDP 10 User Manual download pdf (Page 4)

ZyWALL IDP 10 Quick Start Guide

1 Introduction to Intrusions

Refer to the following figure for the introduction.

Figure 1 Intrusions

Figure 1 represents a typical business network consisting of an employee LAN, a DMZ (DeMilitarized

Zone) containing the company web, FTP, mail etc. servers, a firewall and/or NAT router connected to a

broadband modem for Internet access.

Host-based intrusions are what most people call “virus attacks”. The goal of host-based intrusions is to

infiltrate files on an individual computer or server (see 1 in Figure 1) in with the goal of accessing or

destroying confidential information. To protect against host-based intrusions you need to install anti-

virus software on your computer or/and install a device with anti-virus software such as the Prestige

662HW. Sources of host-based attacks are the Internet, telecommuting employees using VPN to access

the company intranet, employees (inadvertently) using infected floppy disks, memory sticks, removable

hard drives etc.

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ZyXEL ZYWALL IDP 10 User Manual Page 4