ZyXEL Communications 100 Series User Manual

ZyWALL USG 100/200 Series User’s Guide

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. 

• Use the Anti-X > IDP > General screen (

) 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 (

) to add a new profile, 

edit an existing profile or delete an existing profile.

• Use the Anti-X > IDP > Custom Signature screens to create a new signature, edit an 

existing signature, delete existing signatures or save signatures to your computer.

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 

).

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. 

An IDP profile is a set of related IDP signatures that you can activate as a set and configure 
common log and action settings. You can apply IDP profiles to traffic flowing from one zone 
to another. For example, apply the default LAN_IDP profile to any traffic going to the LAN 
zone in order to protect your LAN computers.