Operation Manual

Table of Contents
NBG318S User’s Guide
13
12.5.1 Trigger Port Forwarding Example .......................................................................... 140
12.5.2 Two Points To Remember About Trigger Ports ...................................................... 141
12.6 NAT Advanced Screen .................................................................................................... 141
Chapter 13
Dynamic DNS ........................................................................................................................ 145
13.1 Dynamic DNS Introduction ............................................................................................. 145
13.1.1 DynDNS Wildcard .................................................................................................. 145
13.2 Dynamic DNS Screen .................................................................................................... 145
Part III: Security.................................................................................... 149
Chapter 14
Firewall................................................................................................................................... 151
14.1 Introduction to ZyXEL’s Firewall .................................................................................... 151
14.1.1 What is a Firewall? ................................................................................................. 151
14.1.2 Stateful Inspection Firewall .................................................................................... 151
14.1.3 About the NBG318S Firewall ................................................................................. 151
14.1.4 Guidelines For Enhancing Security With Your Firewall .......................................... 152
14.2 Triangle Routes ............................................................................................................... 152
14.2.1 Triangle Routes and IP Alias .................................................................................. 152
14.3 General Firewall Screen ............................................................................................... 153
14.4 Services Screen .............................................................................................................. 154
Chapter 15
Content Filtering ...................................................................................................................157
15.1 Introduction to Content Filtering ...................................................................................... 157
15.2 Restrict Web Features .....................................................................................................157
15.3 Days and Times ............................................................................................................... 157
15.4 Filter Screen .................................................................................................................... 157
15.5 Schedule .......................................................................................................................... 159
15.6 Customizing Keyword Blocking URL Checking ............................................................... 160
15.6.1 Domain Name or IP Address URL Checking ......................................................... 160
15.6.2 Full Path URL Checking ......................................................................................... 160
15.6.3 File Name URL Checking ....................................................................................... 160
Part IV: Management............................................................................ 161
Chapter 16
Static Route Screens ............................................................................................................163