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NXC5200 User’s Guide
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H A P T E R
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ADP
22.1 Overview
This chapter introduces ADP (Anomaly Detection and Prevention), anomaly
profiles and applying an ADP profile to a traffic direction. ADP protects against
anomalies based on violations of protocol standards (RFCs – Requests for
Comments) and abnormal flows such as port scans.
ADP and IDP Comparison:
1
ADP anomaly detection is in general effective against abnormal behavior while IDP
packet inspection signatures are in general effective for known attacks (see
for information on packet inspection).
2
ADP traffic and anomaly rules are updated when you upload new firmware. This is
different from the IDP packet inspection signatures and the system protect
signatures you download from myZyXEL.com.
22.1.1 What You Can Do in this Chapter
• The General screen (
) turns anomaly detection on or
off and applies anomaly profiles to traffic directions.
• The Profile screen (
) adds new profiles, edits an
existing profile or deletes an existing profile.
22.1.2 What You Need To Know
The following terms and concepts may help as you read this chapter.
Traffic Anomalies
Traffic anomaly rules look for abnormal behavior or events such as port scanning,
sweeping or network flooding. It operates at OSI layer-2 and layer-3. Traffic
anomaly rules may be updated when you upload new firmware.