ZyXEL Communications ZyXEL ZyWALL USG-1000, Руководство пользователя

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ZyWALL USG 2000 User’s Guide
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IDP
31.1 Overview
This chapter introduces packet inspection IDP (Intrusion, Detection and
Prevention), IDP profiles, binding an IDP profile to a traffic flow, custom
signatures and updating signatures. An IDP system can detect malicious or
suspicious packets and respond instantaneously. IDP on the ZyWALL protects
against network-based intrusions.
31.1.1 What You Can Do Using the IDP Screens
• Use the Anti-X > IDP > General screen ( Section 31.2 on page 489 ) to turn
IDP on or off, bind IDP profiles to traffic directions, and view registration and
signature information. Click the Add or Edit icon in this screen to bind an IDP
profile to a traffic direction.
• Use the Anti-X > IDP > Profile screen ( Section 31.3 on page 492 ) to add a
new profile, edit an existing profile or delete an existing profile.
• Use the Anti-X > IDP > Custom Signature screens ( Section 31.8 on page
506 ) to create a new signature, edit an existing signature, delete existing
signatures or save signatures to your computer.
31.1.2 What You Need To Know About IDP
Packet Inspection Signatures
A signature identifies a malicious or suspicious packet and specifies an action to
be taken. You can change the action in the profile screens. Packet inspection
signatures examine OSI (Open System Interconnection) layer-4 to layer-7 packet
contents for malicious data. Generally, packet inspection signatures are created
for known attacks while anomaly detection looks for abnormal behavior (see
Chapter 32 on page 521 ).
Zone
A zone is a combination of ZyWALL interfaces and VPN connections used for
configuring security. See the zone chapter for details on zones and the interfaces
chapter for details on interfaces.