User`s guide

Chapter 1. Scope
1.1. Identification
This document describes the capabilities of a Protogate Freeway® which can be used to enhance security.
1.2. System Overview
The Protogate Freeway is a data communication system which connects one or more serial-link channels
(Wide-Area-Network, or WAN channels) of various types to one or more IP (Internet Protocol) networks. The
Freeway acts as a gateway, providing WAN channel access to clients on the IP network.
All Protogate Freeways run custom-built software which is written and provided by Protogate, and which completely
controls the Freeway. The Freeway software is based on a version of the FreeBSD operating system which has been
modified to control one or more Protogate Intelligent Communications Processor (ICP) boards. ICP boards are
Protogate-manufactured boards which can be installed into a Freeway chassis, plugged into one or more serial-link
channels, and configured to implement a data communications protocol. Each ICP board installed into a Freeway
provides 2, 4, or 8 WAN ports.
1.3. Document Overview
This document describes some of the security capabilities of a Protogate Freeway . The contents of this document are
considered to be sensitive, and dissemination of this document should be restricted; only those who are interested in
improving the security level of Protogate Freeway systems should read this document.
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