ZyXEL Communications NBG420N - Manual (Page 15)

Table of Contents
NBG420N User’s Guide
15
11.4.1 Game List Example ................................................................................................ 141
11.5 Trigger Port Forwarding ................................................................................................... 142
11.5.1 Trigger Port Forwarding Example ........................................................................... 142
11.5.2 Two Points To Remember About Trigger Ports ...................................................... 143
11.6 NAT Advanced Screen ..................................................................................................... 143
Chapter 12
Dynamic DNS ........................................................................................................................ 147
12.1 Dynamic DNS Introduction ............................................................................................. 147
12.1.1 DynDNS Wildcard .................................................................................................. 147
12.2 Dynamic DNS Screen .................................................................................................... 147
Part III: Security.................................................................................... 151
Chapter 13
Firewall................................................................................................................................... 153
13.1 Introduction to ZyXEL’s Firewall .................................................................................... 153
13.1.1 What is a Firewall? ................................................................................................. 153
13.1.2 Stateful Inspection Firewall .................................................................................... 153
13.1.3 About the NBG420N Firewall ................................................................................. 153
13.1.4 Guidelines For Enhancing Security With Your Firewall .......................................... 154
13.2 Triangle Routes ............................................................................................................... 154
13.2.1 Triangle Routes and IP Alias .................................................................................. 154
13.3 General Firewall Screen ............................................................................................... 155
13.4 Services Screen ............................................................................................................. 156
13.4.1 The Add Firewall Rule Screen ............................................................................... 157
Chapter 14
Content Filtering ................................................................................................................... 161
14.1 Introduction to Content Filtering ...................................................................................... 161
14.2 Restrict Web Features ..................................................................................................... 161
14.3 Days and Times ............................................................................................................... 161
14.4 Filter Screen .................................................................................................................... 161
14.5 Schedule .......................................................................................................................... 163
14.6 Customizing Keyword Blocking URL Checking ............................................................... 164
14.6.1 Domain Name or IP Address URL Checking ......................................................... 164
14.6.2 Full Path URL Checking ......................................................................................... 164
14.6.3 File Name URL Checking ....................................................................................... 164
Chapter 15
IPSec VPN.............................................................................................................................. 165