ZyXEL Communications P-793H v3 User Manual page 7

9.4.1 The Address Mapping Rule Edit Screen .................................................................................93
9.5 The ALG Screen ...............................................................................................................................94
9.6 NAT Technical Reference ..................................................................................................................95
9.6.1 NAT Definitions ........................................................................................................................95
9.6.2 What NAT Does .......................................................................................................................96
9.6.3 How NAT Works ......................................................................................................................96
9.6.4 NAT Application .......................................................................................................................96
9.6.5 NAT Mapping Types ................................................................................................................97
Chapter 10
Firewalls ..............................................................................................................................................99
10.1 Overview .........................................................................................................................................99
10.1.1 What You Can Do in the Firewall Screens .............................................................................99
10.1.2 What You Need to Know About Firewall ..............................................................................100
10.1.3 Firewall Rule Setup Example ..............................................................................................100
10.2 The Firewall General Screen ........................................................................................................103
10.3 The Firewall Rule Screen ..............................................................................................................104
10.3.1 Configuring Firewall Rules ..................................................................................................105
10.4 The Firewall Threshold Screen .....................................................................................................107
10.4.1 Threshold Values .................................................................................................................108
10.4.2 Configuring Firewall Thresholds ..........................................................................................108
10.5 Firewall Technical Reference ........................................................................................................ 110
10.5.1 Firewall Rules Overview ...................................................................................................... 110
10.5.2 Guidelines For Enhancing Security With Your Firewall ....................................................... 111
10.5.3 Security Considerations ....................................................................................................... 112
Chapter 11
URL Blocking .................................................................................................................................... 113
11.1 Overview ...................................................................................................................................... 113
11.1.1 What You Can Do in the URL Blocking Screens ................................................................. 113
11.1.2 What You Need to Know About URL Blocking ..................................................................... 113
11.1.3 Before You Begin ................................................................................................................. 113
11.1.4 URL Blocking Example ........................................................................................................ 113
11.2 The Keyword Screen .................................................................................................................... 115
11.3 The Schedule Screen ................................................................................................................... 116
11.4 The Trusted Screen ...................................................................................................................... 117
Chapter 12
Packet Filter ...................................................................................................................................... 119
12.1 Overview ....................................................................................................................................... 119
12.1.1 What You Can Do in the Packet Filter Screen ..................................................................... 119
12.1.2 What You Need to Know About the Packet Filter ................................................................ 119
12.2 The Packet Filter Screen ............................................................................................................... 119
Table of Contents
P-79X Series User's Guide
7