Table of Contents
ZyXEL NBG-334SH User’s Guide
14
8.2 DHCP Server General Screen ........................................................................................... 105
8.3 DHCP Server Advanced Screen .................................................................................... 106
8.4 Client List Screen .............................................................................................................. 107
Chapter 9
Network Address Translation (NAT).................................................................................... 109
9.1 NAT Overview ................................................................................................................. 109
9.2 Using NAT .......................................................................................................................... 109
9.2.1 Port Forwarding: Services and Port Numbers .......................................................... 109
9.2.2 Configuring Servers Behind Port Forwarding Example .............................................110
9.3 General NAT Screen ...........................................................................................................110
9.4 NAT Application Screen .................................................................................................... 111
9.4.1 Game List Example ...................................................................................................113
9.5 Trigger Port Forwarding .....................................................................................................114
9.5.1 Trigger Port Forwarding Example .............................................................................114
9.5.2 Two Points To Remember About Trigger Ports .........................................................115
9.6 NAT Advanced Screen .......................................................................................................115
Chapter 10
Dynamic DNS ........................................................................................................................ 119
10.1 Dynamic DNS Introduction ..............................................................................................119
10.1.1 DynDNS Wildcard ...................................................................................................119
10.2 Dynamic DNS Screen .....................................................................................................119
Chapter 11
Firewall................................................................................................................................... 121
11.1 Introduction to ZyXEL’s Firewall ..................................................................................... 121
11.1.1 What is a Firewall? ................................................................................................. 121
11.1.2 Stateful Inspection Firewall ..................................................................................... 121
11.1.3 About the ZyXEL Device Firewall ........................................................................... 121
11.1.4 Guidelines For Enhancing Security With Your Firewall .......................................... 122
11.2 Triangle Routes ................................................................................................................ 122
11.2.1 Triangle Routes and IP Alias .................................................................................. 122
11.3 General Firewall Screen ............................................................................................... 123
11.4 Services Screen .............................................................................................................. 124
Chapter 12
Content Filtering ................................................................................................................... 127
12.1 Introduction to Content Filtering ...................................................................................... 127
12.2 Restrict Web Features .....................................................................................................127
12.3 Days and Times ............................................................................................................... 127
12.4 Filter Screen .................................................................................................................... 127
12.5 Schedule .......................................................................................................................... 129
