Chapter 2 Features and Applications

Firewall

The ZyWALL’s firewall is a stateful inspection firewall. The ZyWALL restricts access by screening data packets against defined access rules. It can also inspect sessions. For example, traffic from one zone is not allowed unless it is initiated by a computer in another zone first.

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 Section 30.6.2 on page 490 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 Section 31.3.4 on page 518 and Section 31.3.5 on page 521 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.

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ZyWALL USG 50 User’s Guide