ZyXEL Communications Internet Security Gateway ZyWALL 100 - Manual (Page 9)

ZyWALL 100 Internet Security Gateway
Table of Contents ix
Chapter 12 Network Address Translation (NAT) ............................................................................... 12-1
12.1 Introduction.......................................................................................................................... 12-1
12.2 Using NAT........................................................................................................................... 12-6
12.3 NAT Setup ........................................................................................................................... 12-8
12.4 NAT Server Sets – Port Forwarding .................................................................................. 12-14
12.5 General NAT Examples ..................................................................................................... 12-17
12.6 Trigger Port Forwarding..................................................................................................... 12-24
Firewall and Content Filters ........................................................................................................................ III
Chapter 13 Firewalls ............................................................................................................................. 13-1
13.1 What Is a Firewall? .............................................................................................................. 13-1
13.2 Types of Firewalls................................................................................................................ 13-1
13.3 Introduction to ZyXEL’s Firewall........................................................................................ 13-2
13.4 Denial of Service.................................................................................................................. 13-3
13.5 Stateful Inspection................................................................................................................ 13-7
13.6 Guidelines For Enhancing Security With Your Firewall ................................................... 13-11
13.7 Packet Filtering Vs Firewall............................................................................................... 13-12
Chapter 14 Introducing the ZyWALL Firewall .................................................................................. 14-1
14.1 Remote Management and the Firewall................................................................................. 14-1
14.2 Access Methods ................................................................................................................... 14-1
14.3 Using ZyWALL SMT Menus .............................................................................................. 14-1
Chapter 15 Using the ZyWALL Web Configurator............................................................................ 15-1
15.1 Web Configurator Login and Main Menu Screens .............................................................. 15-1
15.2 Enabling the Firewall ........................................................................................................... 15-1
15.3 E-mail................................................................................................................................... 15-2
15.4 Attack Alert.......................................................................................................................... 15-6
Chapter 16 Creating Custom Rules ..................................................................................................... 16-1
16.1 Rules Overview.................................................................................................................... 16-1