ZyXEL Communications P-334U, P-335U Chapter, Chapter, Chapter, Chapter, Content Filtering, Network Address Translation (NAT)

P-334U/P-335U User’s Guide

Chapter 9
Network Address Translation (NAT) ...................................................................	115
9.1 NAT Overview ...............................................................................................	115
9.2 Using NAT ........................................................................................................	115
9.2.1 Port Forwarding: Services and Port Numbers ........................................	115
9.2.2 Configuring Servers Behind Port Forwarding (Example) ........................	116
9.3 General NAT Screen ........................................................................................	116
9.4 NAT Application Screen .................................................................................	117
9.4.1 Game List Example ................................................................................	119
9.5 Trigger Port Forwarding ..................................................................................	120
9.5.1 Trigger Port Forwarding Example ..........................................................	121
9.5.2 Two Points To Remember About Trigger Ports .......................................	121
9.6 NAT Advanced Screen .....................................................................................	121
Chapter 10
Dynamic DNS........................................................................................................	125
10.1 Dynamic DNS Introduction ............................................................................	125
10.1.1 DynDNS Wildcard ................................................................................	125
10.2 Dynamic DNS Screen ..................................................................................	125
Chapter 11
Firewall..................................................................................................................	127
11.1 Introduction to Firewall .................................................................................	127
11.1.1 What is a Firewall? ................................................................................	127
11.1.2 Stateful Inspection Firewall. ..................................................................	127
11.1.3 About the ZyXEL Device Firewall .........................................................	127
11.1.4 Guidelines For Enhancing Security With Your Firewall .........................	128
11.2 General Firewall Screen ..............................................................................	128
11.3 Services Screen ............................................................................................	129
Chapter 12
Content Filtering .................................................................................................	133
12.1 Introduction to Content Filtering .....................................................................	133
12.2 Restrict Web Features ...................................................................................	133
12.3 Days and Times .............................................................................................	133
12.4 Filter Screen ...................................................................................................	133
12.5 Schedule ........................................................................................................	135
12.6 Customizing Keyword Blocking URL Checking ..............................................	136
12.6.1 Domain Name or IP Address URL Checking ........................................	136
12.6.2 Full Path URL Checking .......................................................................	136
12.6.3 File Name URL Checking .....................................................................	137

14 Table of Contents