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Administrator’s Guide

Overview 9

The Barracuda Web Filter scans inbound traffic for the following malware over HTTP port 80 and

FTP port 21: spyware (such as keyloggers, Browser Helper Objects [BHOs], and data miners),

adware, trojans, and viruses. The Barracuda Web Filter also scans outbound traffic on all ports and

protocols to prevent spyware from communicating outside of your network.

Content-filtering techniques

In addition to protecting your network from spyware infections, the Barracuda Web Filter also uses

filters to protect your users from visiting offensive Web sites and to help enforce your organization’s

Internet usage policies.

To block access to offensive sites, the Barracuda Web Filter includes a URL list containing millions

of URLs classified into 58 categories for easy and efficient content filtering. This list is continuously

updated by engineers at Barracuda Central and delivered hourly via the Energize Updates

subscription service sold with the Barracuda Web Filter.

These content filters can help organizations comply with new security initiatives and standards.

User and group-based policy control

The Barracuda Web Filter enables you to create exception policies for specific users and groups so

they can override the blocking filters that prevent them from accessing content or applications. These

policies are useful in providing executives and departments with additional control over the content

they can access.

You can also use exception policies to allow users to bypass blocking filters during specific hours of

the day. For example, you can configure the Barracuda Web Filter to allow users to access shopping

or gaming sites only during non-business hours.

Application-blocking techniques

Many organizations choose to block access to certain applications so they can minimize the amount

of non-essential traffic on their network and to prevent users from running applications that can

spread viruses or other malware. For this reason, the Barracuda Web Filter enables you to block

access to applications based on their MIME type or port number as well as to common applications

like Real Player or Yahoo Messenger.

For example, you can use the MIME type blocking feature to prevent users from running executable

files (.exe) or from streaming music and video files over your network.

Energize Updates minimize administration and maximize

protection

To provide you with maximum protection against the latest types of spyware, Barracuda Networks

maintains Barracuda Central, a powerful operations center. From this center, engineers monitor the

Internet for trends in spyware and automatically deploy updates and definitions via Barracuda

Energize Updates.

By identifying spyware trends early on, the team at Barracuda Central can quickly develop new and

improved blocking techniques that are quickly made available to your Barracuda Web Filter.

Barracuda Central has identified over 2,000 spyware applications that are actively blocked and is

continuously adding to this list.

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Barracuda Networks 4 Spezifikationen Seite 9