ZyXEL Communications G-2000 Plus manual 14

ZyAIR G-2000 Plus User’s Guide

12.3	Configuring Telnet ..........................................................................................	158
12.4	Configuring TELNET ......................................................................................	159
12.5	Configuring FTP .............................................................................................	160
12.6 SNMP .............................................................................................................		161
12.6.1 Supported MIBs ....................................................................................		162
12.6.2 SNMP Traps .........................................................................................		162
12.6.3 Configuring SNMP ................................................................................		163
12.7	Configuring DNS ............................................................................................	165
12.8	Configuring Security .......................................................................................	166
Chapter 13
UPnP......................................................................................................................		168
13.1	Universal Plug and Play Overview ................................................................	168
13.1.1 How Do I Know If I'm Using UPnP? ......................................................		168
13.1.2 NAT Traversal .......................................................................................		168
13.1.3 Cautions with UPnP ..............................................................................		168
13.2 UPnP and ZyXEL ...........................................................................................		169
13.3	Configuring UPnP ..........................................................................................	169
13.4	Installing UPnP in Windows Example ............................................................	170
13.4.1 Installing UPnP in Windows Me ............................................................		171
13.4.2 Installing UPnP in Windows XP ............................................................		172
13.5	Using UPnP in Windows XP Example ...........................................................	173
13.5.1 Auto-discover Your UPnP-enabled Network Device .............................		174
13.5.2 Web Configurator Easy Access ............................................................		175
13.5.3 Web Configurator Easy Access ............................................................		176
Chapter 14
Firewalls................................................................................................................		178
14.1	Firewall Overview ...........................................................................................	178
14.2	Types of Firewalls ..........................................................................................	178
14.2.1 Packet Filtering Firewalls ......................................................................		178
14.2.2 Application-level Firewalls ....................................................................		178
14.2.3 Stateful Inspection Firewalls .................................................................		179
14.3	Introduction to ZyXEL’s Firewall .....................................................................	179
14.4	Denial of Service ............................................................................................	180
14.4.1 Basics ...................................................................................................		180
14.4.2 Types of DoS Attacks ...........................................................................		181
	14.4.2.1 ICMP Vulnerability ......................................................................	184
	14.4.2.2 Traceroute ...................................................................................	184
14.5	Stateful Inspection ..........................................................................................	185
14.5.1 Stateful Inspection Process ..................................................................		185
14.5.2 Stateful Inspection and the ZyAIR ........................................................		186
14.5.3 TCP Security .........................................................................................		187

13 Table of Contents