ZyXEL P-661H Series Manual de usuario Pagina 14

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Table of Contents
P-661H/HW Series User’s Guide
14
6.7 WMM QoS ..........................................................................................................................117
6.7.1 WMM QoS Example ..................................................................................................117
6.7.2 WMM QoS Priorities ..................................................................................................117
6.7.3 Services ....................................................................................................................118
6.8 QoS Screen ........................................................................................................................119
6.8.1 ToS (Type of Service) and WMM QoS ..................................................................... 120
6.8.2 Application Priority Configuration ............................................................................. 121
Chapter 7
Network Address Translation (NAT) Screens.....................................................................123
7.1 NAT Overview ................................................................................................................... 123
7.1.1 NAT Definitions ........................................................................................................ 123
7.1.2 What NAT Does ....................................................................................................... 124
7.1.3 How NAT Works ....................................................................................................... 124
7.1.4 NAT Application ........................................................................................................ 124
7.1.5 NAT Mapping Types ................................................................................................. 125
7.2 SUA (Single User Account) Versus NAT ........................................................................... 126
7.3 NAT General Setup ........................................................................................................... 126
7.4 Port Forwarding ................................................................................................................. 127
7.4.1 Default Server IP Address ........................................................................................ 127
7.4.2 Port Forwarding: Services and Port Numbers .......................................................... 128
7.4.3 Configuring Servers Behind Port Forwarding (Example) ......................................... 128
7.5 Configuring Port Forwarding ............................................................................................. 129
7.5.1 Port Forwarding Rule Edit ....................................................................................... 131
7.6 Address Mapping .............................................................................................................. 131
7.6.1 Address Mapping Rule Edit ..................................................................................... 133
Part III: Security.................................................................................... 135
Chapter 8
Firewalls................................................................................................................................. 137
8.1 Firewall Overview ............................................................................................................. 137
8.2 Types of Firewalls .............................................................................................................. 137
8.2.1 Packet Filtering Firewalls ......................................................................................... 137
8.2.2 Application-level Firewalls ........................................................................................ 138
8.2.3 Stateful Inspection Firewalls ..................................................................................... 138
8.3 Introduction to ZyXEL’s Firewall ........................................................................................ 138
8.3.1 Denial of Service Attacks ......................................................................................... 139
8.4 Denial of Service ............................................................................................................... 139
8.4.1 Basics ....................................................................................................................... 139
8.4.2 Types of DoS Attacks ............................................................................................... 140
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