ZyXEL Communications 200 Series User Manual
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Chapter 2 Features and Applications
ZyWALL USG 100/200 Series User’s Guide
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Intrusion Detection and Prevention (IDP)
IDP (Intrusion Detection and Protection) can detect malicious or suspicious packets and
respond instantaneously. It detects pattern-based attacks in order to protect against network-
based intrusions. See
for a list of attacks that the ZyWALL can
protect against. You can also create your own custom IDP rules.
Anomaly Detection and Prevention (ADP)
ADP (Anomaly Detection and Prevention) can detect malicious or suspicious packets and
respond instantaneously. It can detect:
• Anomalies based on violations of protocol standards (RFCs – Requests for Comments)
• Abnormal flows such as port scans.
The ZyWALL’s ADP protects against network-based intrusions. See
and
for more on the kinds of attacks that the ZyWALL can
protect against. You can also create your own custom ADP rules.
Bandwidth Management
Bandwidth management allows you to allocate network resources according to defined
policies. This policy-based bandwidth allocation helps your network to better handle
applications such as Internet access, e-mail, Voice-over-IP (VoIP), video conferencing and
other business-critical applications.
Content Filter
Content filtering allows schools and businesses to create and enforce Internet access policies
tailored to the needs of the organization.
You can also subscribe to category-based content filtering that allows your ZyWALL to check
web sites against an external database of dynamically-updated ratings of millions of web sites.
You then simply select categories to block or monitor, such as pornography or racial
intolerance, from a pre-defined list.
Anti-Virus Scanner
With the anti-virus packet scanner, your ZyWALL scans files transmitting through the enabled
interfaces into the network. The ZyWALL helps stop threats at the network edge before they
reach the local host computers.
Anti-Spam
The anti-spam feature can mark or discard spam. Use the white list to identify legitimate e-
mail. Use the black list to identify spam e-mail. The ZyWALL can also check e-mail against a
DNS black list (DNSBL) of IP addresses of servers that are suspected of being used by
spammers.