ZyXEL Communications P-2602HW-63C Guía de usuario descargar pdf (Pagina 16)

Prestige 2602H/HW Series User’s Guide

16 Table of Contents

Chapter 11

Dynamic DNS Setup............................................................................................. 161

11.1 Dynamic DNS .................................................................................................161

11.1.1 DYNDNS Wildcard ................................................................................161

11.2 Configuring Dynamic DNS .............................................................................161

Chapter 12

Time and Date....................................................................................................... 163

12.1 Pre-defined NTP Time Servers List ................................................................163

12.2 Configuring Time and Date ............................................................................163

Chapter 13

Firewalls................................................................................................................ 167

13.1 Firewall Overview ...........................................................................................167

13.2 Types of Firewalls ..........................................................................................167

13.2.1 Packet Filtering Firewalls ......................................................................167

13.2.2 Application-level Firewalls ....................................................................167

13.2.3 Stateful Inspection Firewalls ................................................................168

13.3 Introduction to ZyXEL’s Firewall .....................................................................168

13.3.1 Denial of Service Attacks ......................................................................169

13.4 Denial of Service ............................................................................................169

13.4.1 Basics ...................................................................................................169

13.4.2 Types of DoS Attacks ...........................................................................170

13.4.2.1 ICMP Vulnerability ......................................................................172

13.4.2.2 Illegal Commands (NetBIOS and SMTP) ....................................172

13.4.2.3 Traceroute ...................................................................................173

13.5 Stateful Inspection ..........................................................................................173

13.5.1 Stateful Inspection Process ..................................................................174

13.5.2 Stateful Inspection and the Prestige .....................................................175

13.5.3 TCP Security .........................................................................................175

13.5.4 UDP/ICMP Security ..............................................................................176

13.5.5 Upper Layer Protocols ..........................................................................176

13.6 Guidelines for Enhancing Security with Your Firewall ....................................176

13.6.1 Security In General ...............................................................................177

13.7 Packet Filtering Vs Firewall ............................................................................178

13.7.1 Packet Filtering: ....................................................................................178

13.7.1.1 When To Use Filtering .................................................................178

13.7.2 Firewall .................................................................................................178

13.7.2.1 When To Use The Firewall ..........................................................178

Chapter 14

Firewall Configuration ......................................................................................... 181

14.1 Access Methods .............................................................................................181

1 2 ... 11 12 13 14 15 16 17 18 19 20 21 ... 549 550

Sin comentarios

ZyXEL Communications P-2602HW-63C Guía de usuario Pagina 16