User's Manual

Table of Contents
P-793H User’s Guide
19
Chapter 28
NAT Setup.............................................................................................................................. 279
28.1 Using NAT ........................................................................................................................ 279
28.1.1 SUA (Single User Account) Versus NAT ................................................................ 279
28.1.2 Applying NAT ......................................................................................................... 279
28.2 NAT Setup ....................................................................................................................... 281
28.2.1 Address Mapping Sets ........................................................................................... 281
28.3 Configuring a Server behind NAT .................................................................................... 284
28.4 General NAT Examples ................................................................................................... 286
28.4.1 Internet Access Only .............................................................................................. 286
28.4.2 Example 2: Internet Access with a Default Server ................................................. 287
28.4.3 Example 3: Multiple Public IP Addresses With Inside Servers .............................. 288
28.4.4 Example 4: NAT Unfriendly Application Programs ................................................. 291
Chapter 29
Firewall Setup........................................................................................................................ 293
29.1 Using ZyXEL Device SMT Menus ................................................................................... 293
29.1.1 Activating the Firewall ............................................................................................ 293
Chapter 30
Filter Configuration............................................................................................................... 295
30.1 Introduction to Filters ....................................................................................................... 295
30.1.1 The Filter Structure of the ZyXEL Device ............................................................... 296
30.2 Configuring a Filter Set .................................................................................................... 297
30.2.1 Configuring a Filter Rule ........................................................................................ 299
30.2.2 Configuring a TCP/IP Filter Rule ............................................................................ 300
30.2.3 Configuring a Generic Filter Rule ........................................................................... 302
30.3 Example Filter .................................................................................................................. 304
30.4 Filter Types and NAT ....................................................................................................... 306
30.5 Firewall Versus Filters ..................................................................................................... 306
30.6 Applying a Filter ............................................................................................................... 306
30.6.1 Applying LAN Filters ............................................................................................... 307
30.6.2 Applying Remote Node Filters ............................................................................... 307
Chapter 31
SNMP Configuration.............................................................................................................309
31.1 SNMP Configuration ........................................................................................................309
Chapter 32
System Password .................................................................................................................311
Chapter 33
System Information & Diagnosis......................................................................................... 313