User manual

Introduction
1
1. Introduction
This manual describes the features and capabilities of your SG unit, and provides you
with instructions on how to best take advantage of them.
This includes setting up network connections (in the chapter entitled Network
Connections), tailoring the firewall to your network (Firewall), and establishing a virtual
private network (Virtual Private Networking). It also guides you through setting up the SG
unit on your existing or new network using the web management console (Getting
Started).
This chapter provides a high level overview to familiarize you with your SG unit’s features
and capabilities.
SG Gateway Appliances (SG3xx, SG5xx Series)
Note
The SG gateway appliance range includes models SG300, SG530, SG550, SG560,
SG565, SG570, SG575 and SG580.
The SG gateway appliance range provides Internet security and
privacy of communications for small and medium enterprises, and
branch offices. It simply and securely connects your office to the
Internet, and with its robust stateful firewall, shields your computers
from external threats.
With the SG unit’s masquerading firewall, hosts on your LAN (local area network) can
see and access resources on the Internet, but all outsiders see is the SG unit’s external
address.
You may tailor your SG unit to disallow access from your LAN to specific Internet sites or
categories of content, give priority to specific types of network traffic, and allow controlled
access to your LAN from the outside world. You may also choose to enable intrusion
detection and prevention services on your SG unit, to further bolster the security of your
local network.