All Barracuda Web Filters, all firmware versions.
Barracuda Networks recommends that you implement your security in layers. While the Barracuda Web Filter, when deployed inline at the edge of your network, will protect your network from incoming web-borne threats, it will not block viruses that invade in other ways, like through email, IM file transfer, or physical media like CDs or flash drives. The Barracuda Web Filter will not generally filter internal network traffic either - unless the Barracuda Web filter is placed between devices on your network (which is not recommended).
The Barracuda Web Filter is an important part of any network's defense, but is not a complete virus protection solution in itself. Installing antivirus software on other network devices, including mail servers and workstations, will provide additional layers of security. All Barracuda Networks products are designed to work with other antivirus solutions that may already be in place or may be added in the future.
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