Barracuda Networks 4 Installationsanleitung PDF herunterladen (Seite 10)

10 Barracuda Spam Firewall Administrator’s Guide

Overview

The Barracuda Spam Firewall is an integrated hardware and software solution that provides powerful

and scalable spam and virus-blocking capabilities that do not impede the performance of your e-mail

servers. The system has no per-user license fee and can be scaled to support tens of thousands of active

e-mail users.

Using the Web-based administration interface, you can configure up to ten defense layers that protect

your users from spam and viruses. The ten defense layers are:

• Denial of service and security protection

• IP block list

• Rate control

• Virus check with archive decompression

• Proprietary virus check

• User-specified rules

• Spam fingerprint check

• Intention analysis

• Bayesian analysis

• Rule-based spam scoring

The following figure shows each of these defense layers in action:

Energize Updates Minimize Administration and Maximize Protection

To provide you with maximum protection against the latest types of spam and virus attacks,

Barracuda Networks maintains a powerful operations center called Barracuda Central. From this

center, engineers monitor the Internet for trends in spam and virus attacks and post updated definitions

to Barracuda Central. These updates are then automatically retrieved by your Barracuda Spam

Firewall using the Energize Update feature.

By identifying spam trends at an early stage, the team at Barracuda Central can quickly develop new

and improved blocking techniques and virus definitions that are quickly made available to your

Barracuda Spam Firewall.

Figure 1.1:

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Barracuda Networks 4 Installationsanleitung Seite 10