ZyXEL Communications 5 Series - Page 25

Table of Contents
ZyWALL 5/35/70 Series User’s Guide
25
44.3 Configuring a Server behind NAT .................................................................................... 681
44.4 General NAT Examples ................................................................................................... 683
44.4.1 Internet Access Only .............................................................................................. 683
44.4.2 Example 2: Internet Access with a Default Server ................................................. 685
44.4.3 Example 3: Multiple Public IP Addresses With Inside Servers .............................. 685
44.4.4 Example 4: NAT Unfriendly Application Programs ................................................. 689
44.5 Trigger Port Forwarding ...................................................................................................690
44.5.1 Two Points To Remember About Trigger Ports ...................................................... 690
Chapter 45
Introducing the ZyWALL Firewall........................................................................................693
45.1 Using ZyWALL SMT Menus ............................................................................................ 693
45.1.1 Activating the Firewall ............................................................................................ 693
Chapter 46
Filter Configuration...............................................................................................................695
46.1 Introduction to Filters ....................................................................................................... 695
46.1.1 The Filter Structure of the ZyWALL ........................................................................ 696
46.2 Configuring a Filter Set .................................................................................................... 698
46.2.1 Configuring a Filter Rule ........................................................................................ 699
46.2.2 Configuring a TCP/IP Filter Rule ............................................................................ 700
46.2.3 Configuring a Generic Filter Rule ........................................................................... 702
46.3 Example Filter .................................................................................................................. 704
46.4 Filter Types and NAT ....................................................................................................... 706
46.5 Firewall Versus Filters ..................................................................................................... 706
46.5.1 Packet Filtering: ..................................................................................................... 706
46.5.2 Firewall ................................................................................................................... 707
46.6 Applying a Filter .............................................................................................................. 707
46.6.1 Applying LAN Filters ............................................................................................... 708
46.6.2 Applying DMZ Filters .............................................................................................. 708
46.6.3 Applying Remote Node Filters ............................................................................... 709
Chapter 47
SNMP Configuration.............................................................................................................711
47.1 SNMP Configuration .........................................................................................................711
47.2 SNMP Traps .................................................................................................................... 712
Chapter 48
System Information & Diagnosis.........................................................................................713
48.1 Introduction to System Status .......................................................................................... 713
48.2 System Status .................................................................................................................. 713
48.3 System Information and Console Port Speed .................................................................. 715
48.3.1 System Information ................................................................................................ 715