ZyXEL P-661H Series Manual do Utilizador descarregar pdf (Página 14)

Table of Contents

P-661H/HW Series User’s Guide

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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ZyXEL P-661H Series Manual do Utilizador Página 14