ZyWALL User's Guide

Table of Contents
ZyWALL 2 Plus User’s Guide
22
36.4.2 Example 2: Internet Access with a Default Server ................................................. 532
36.4.3 Example 3: Multiple Public IP Addresses With Inside Servers .............................. 532
36.4.4 Example 4: NAT Unfriendly Application Programs ................................................. 536
36.5 Trigger Port Forwarding ...................................................................................................537
36.5.1 Two Points To Remember About Trigger Ports ...................................................... 537
Chapter 37
Introducing the ZyWALL Firewall ........................................................................................ 539
37.1 Using ZyWALL SMT Menus ............................................................................................ 539
37.1.1 Activating the Firewall ............................................................................................ 539
Chapter 38
Filter Configuration............................................................................................................... 541
38.1 Introduction to Filters ....................................................................................................... 541
38.1.1 The Filter Structure of the ZyWALL ........................................................................ 542
38.2 Configuring a Filter Set .................................................................................................... 544
38.2.1 Configuring a Filter Rule ........................................................................................ 546
38.2.2 Configuring a TCP/IP Filter Rule ............................................................................ 546
38.2.3 Configuring a Generic Filter Rule ........................................................................... 549
38.3 Example Filter .................................................................................................................. 550
38.4 Filter Types and NAT ....................................................................................................... 552
38.5 Firewall Versus Filters ..................................................................................................... 552
38.5.1 Packet Filtering: ..................................................................................................... 552
38.5.2 Firewall ................................................................................................................... 553
38.6 Applying a Filter .............................................................................................................. 553
38.6.1 Applying LAN Filters ............................................................................................... 554
38.6.2 Applying DMZ Filters .............................................................................................. 554
38.6.3 Applying Remote Node Filters ............................................................................... 555
Chapter 39
SNMP Configuration.............................................................................................................557
39.1 SNMP Configuration ........................................................................................................557
39.2 SNMP Traps .................................................................................................................... 558
Chapter 40
System Information & Diagnosis......................................................................................... 559
40.1 Introduction to System Status .......................................................................................... 559
40.2 System Status .................................................................................................................. 559
40.3 System Information and Console Port Speed .................................................................. 561
40.3.1 System Information ................................................................................................ 561
40.3.2 Console Port Speed ............................................................................................... 562
40.4 Log and Trace .................................................................................................................. 562
40.4.1 Viewing Error Log ................................................................................................... 562