ZyXEL Communications G-2000 Plus Chapter, Chapter, Chapter, Chapter, Chapter, Dial-inUser Setup, Static Route Setup, Enabling the Firewall, Network Address Translation (NAT)

ZyAIR G-2000 Plus User’s Guide

Chapter 26
Static Route Setup ...............................................................................................		290
26.1	IP Static Route Setup .....................................................................................	290
Chapter 27
Dial-in User Setup ................................................................................................		292
27.1	Dial-in User Setup ..........................................................................................	292
Chapter 28
Network Address Translation (NAT) ...................................................................		294
28.1	Using NAT ......................................................................................................	294
28.1.1 SUA (Single User Account) Versus NAT ..............................................		294
28.2	Applying NAT .................................................................................................	294
28.3	NAT Setup ......................................................................................................	296
28.3.1 Address Mapping Sets ..........................................................................		297
	28.3.1.1 User-Defined Address Mapping Sets ..........................................	298
	28.3.1.2 Ordering Your Rules ....................................................................	299
28.4	Configuring a Server behind NAT ..................................................................	301
28.5	General NAT Examples ..................................................................................	302
28.5.1 Example 1: Internet Access Only ..........................................................		302
28.5.2 Example 2: Internet Access with an Inside Server ...............................		303
28.5.3 Example 3: Multiple Public IP Addresses With Inside Servers .............		304
28.5.4 Example 4: NAT Unfriendly Application Programs ...............................		308
28.6	Configuring Trigger Port Forwarding .............................................................	310
Chapter 29
Filter Configuration..............................................................................................		312
29.1	Introduction to Filters ......................................................................................	312
29.1.1 The Filter Structure of the ZyAIR ..........................................................		313
29.2	Configuring a Filter Set ..................................................................................	314
29.2.1 Configuring a Filter Rule .......................................................................		316
29.2.2 Configuring a TCP/IP Filter Rule ..........................................................		317
29.2.3 Configuring a Generic Filter Rule .........................................................		319
29.3	Example Filter ................................................................................................	321
29.4	Filter Types and NAT ......................................................................................	323
29.5	Firewall Versus Filters ....................................................................................	324
29.6	Applying a Filter ............................................................................................	324
29.6.1 Applying LAN Filters .............................................................................		324
29.6.2 Applying Remote Node Filters ..............................................................		325
Chapter 30
Enabling the Firewall ...........................................................................................		326
30.1	Remote Management and the Firewall ..........................................................	326

17 Table of Contents