Installation; Features; Anti-Spam; Anti-Virus Scanning - 3Com 3CR3MFA-92 User Manual

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Installation

Features

Anti-Spam

Anti-Virus Scanning

Malformed Email
Checks
E F O
MAIL IREWALL VERVIEW
For detailed information on installation, see the
came with your 3Com Email Firewall.
The following sections provide an overview of the main features of the
3Com Email Firewall.
The 3Com Email Firewall contains a variety of powerful features to
prevent spam messages, including the following:
Server-based tools such as DCC (Distributed Checksum
■
Clearinghouse), STA (Statistical Token Analysis), Objectionable
Content Filtering, and Pattern Based Message Filtering that prevent
spam messages from being delivered to an end user's mailbox.
User-based tools for managing quarantined spam and building trusted
■
senders lists for whitelisting.
The 3Com Email Firewall provides a built-in virus scanning service.
When enabled, all messages (inbound and outbound) passing through
the 3Com Email Firewall are scanned for viruses.
Viruses can be selectively blocked depending on whether they are found
in inbound or outbound messages. Message attachments are recursively
disassembled to help ensure that viruses cannot be concealed.
Many viruses try to elude virus scanners by concealing themselves in
malformed messages. The scan engines cannot detect the attachment
and pass the complete message through to an internal server.
Some mail clients try to rebuild malformed messages and may rebuild or
activate a virus-infected attachment. Other types of malformed messages
are designed to attack mail servers directly. These types of messages are
often used in denial-of-service (DoS) attacks.
The 3Com Email Firewall analyzes each message with very extensive
integrity checks. Malformed messages are quarantined if they cannot be
processed.
Installation Guide
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