ZyXEL Communications G-2000 Plus - Manual (Page 18)

ZyAIR G-2000 Plus User’s Guide
17 Table of Contents
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