User guide

User Guide iii
Table of Contents
Chapter 1 Introduction to Network Security ............................................................................................ 1
About networks and network security .......................................................................................................... 1
About Internet Connections ......................................................................................................................... 1
About protocols................................................................................................................................................. 2
How Information Travels on the Internet................................................................................................. 2
About IP addresses................................................................................................................................................ 3
Private addresses and gateways............................................................................................................. 3
About subnet masks ................................................................................................................................... 3
About slash notation ....................................................................................................................................... 3
About entering IP addresses......................................................................................................................... 4
Static and dynamic IP addresses ................................................................................................................. 4
About DHCP........................................................................................................................................................ 4
About PPPoE....................................................................................................................................................... 4
About Domain Name Service (DNS) ............................................................................................................... 5
About services and policies ............................................................................................................................... 5
About ports.............................................................................................................................................................. 6
About Firewalls....................................................................................................................................................... 7
The Firebox X Edge and your Network .......................................................................................................... 8
Chapter 2 Installation ................................................................................................................................. 9
Before you begin.................................................................................................................................................... 9
Verify basic requirements .............................................................................................................................. 9
Identify your network settings................................................................................................................... 10
Find your TCP/IP Properties ................................................................................................................... 11
Find PPPoE settings................................................................................................................................... 12
Disable the HTTP proxy ..................................................................................................................................... 13
Disable the HTTP proxy in Internet Explorer 6.x or 7.x ................................................................. 13
Disable the HTTP proxy in Firefox 2.x ................................................................................................. 14
Disable the HTTP proxy in Safari 2.0.................................................................................................... 14
Disable pop-up blocking................................................................................................................................... 14
Disable the pop-up blocker in Internet Explorer 6.x or 7.x ......................................................... 14
Disable the pop-up blocker in Firefox 2.x ......................................................................................... 14
Disable the pop-up blocker in Safari 2.0............................................................................................ 14
Add computers to the trusted network.................................................................................................. 16
Connect the Edge to more than four devices....................................................................................... 16