User guide

User Guide xv
Contents
CHAPTER 1 Introduction ..................................................1
Package Contents .....................................................3
How a Firewall Works ................................................3
How Information Travels on the Internet ..................4
IP addresses ............................................................5
Protocols ................................................................5
Port numbers ..........................................................5
How the SOHO 6 Processes Information ..................6
Services ..................................................................6
Network Address Translation (NAT) ...........................6
SOHO 6 Hardware Description .................................6
SOHO 6 front and rear views ....................................7
Hardware operating specifications ............................9
CHAPTER 2 Installation ..................................................11
Before you Begin ....................................................12