ZyXEL Communications P-335WT - Manual (Page 19)

P-335 Series User’s Guide
Table of Contents 19
Chapter 29
Network Address Translation (NAT) ................................................................... 317
29.1 Using NAT ......................................................................................................317
29.1.1 SUA (Single User Account) Versus NAT ..............................................317
29.2 Applying NAT .................................................................................................317
29.3 NAT Setup ......................................................................................................319
29.3.1 Address Mapping Sets ..........................................................................320
29.3.1.1 User-Defined Address Mapping Sets ..........................................321
29.3.1.2 Ordering Your Rules ....................................................................322
29.4 Configuring a Server behind NAT ..................................................................324
29.5 General NAT Examples ..................................................................................325
29.5.1 Example 1: Internet Access Only ..........................................................325
29.5.2 Example 2: Internet Access with an Inside Server ...............................326
29.5.3 Example 3: Multiple Public IP Addresses With Inside Servers .............327
29.5.4 Example 4: NAT Unfriendly Application Programs ...............................330
29.6 Configuring Trigger Port Forwarding .............................................................331
Chapter 30
Enabling the Firewall ........................................................................................... 333
30.1 Remote Management and the Firewall ..........................................................333
30.2 Access Methods .............................................................................................333
30.3 Enabling the Firewall ......................................................................................333
Chapter 31
Filter Configuration.............................................................................................. 335
31.1 Introduction to Filters ......................................................................................335
31.1.1 The Filter Structure of the Prestige .......................................................336
31.2 Configuring a Filter Set ..................................................................................337
31.2.1 Configuring a Filter Rule .......................................................................338
31.2.2 Configuring a TCP/IP Filter Rule ..........................................................339
31.2.3 Configuring a Generic Filter Rule .........................................................341
31.3 Example Filter ................................................................................................343
31.4 Filter Types and NAT ......................................................................................345
31.5 Firewall Versus Filters ....................................................................................346
31.6 Applying a Filter ............................................................................................346
31.6.1 Applying LAN Filters .............................................................................346
31.6.2 Applying Remote Node Filters ..............................................................347
Chapter 32
SNMP Configuration ............................................................................................ 349
32.1 About SNMP ..................................................................................................349
32.2 Supported MIBs ............................................................................................350
32.3 SNMP Configuration ......................................................................................350