ZyXEL Communications ZyWALL5UTM 4.0 Chapter, Chapter, Chapter, Chapter, IP Static Route Setup, Introducing the ZyWALL Firewall, Network Address Translation (NAT)

ZyWALL 5/35/70 Series User’s Guide

Chapter 41
IP Static Route Setup ...........................................................................................		556
41.1	IP Static Route Setup .....................................................................................	556
Chapter 42
Network Address Translation (NAT) ...................................................................		558
42.1	Using NAT ......................................................................................................	558
42.1.1 SUA (Single User Account) Versus NAT ..............................................		558
42.1.2 Applying NAT ........................................................................................		558
42.2	NAT Setup ......................................................................................................	560
42.2.1 Address Mapping Sets ..........................................................................		561
	42.2.1.1 SUA Address Mapping Set .........................................................	561
	42.2.1.2 User-Defined Address Mapping Sets ..........................................	562
	42.2.1.3 Ordering Your Rules ....................................................................	563
42.3	Configuring a Server behind NAT ..................................................................	565
42.4	General NAT Examples ..................................................................................	568
42.4.1 Internet Access Only .............................................................................		568
42.4.2 Example 2: Internet Access with an Default Server ..............................		570
42.4.3 Example 3: Multiple Public IP Addresses With Inside Servers .............		570
42.4.4 Example 4: NAT Unfriendly Application Programs ...............................		574
42.5	Trigger Port Forwarding .................................................................................	575
42.5.1 Two Points To Remember About Trigger Ports .....................................		575
Chapter 43
Introducing the ZyWALL Firewall .......................................................................		578
43.1 Using ZyWALL SMT Menus ...........................................................................		578
43.1.1 Activating the Firewall ...........................................................................		578
Chapter 44
Filter Configuration..............................................................................................		580
44.1	Introduction to Filters ......................................................................................	580
44.1.1 The Filter Structure of the ZyWALL ......................................................		581
44.2	Configuring a Filter Set ..................................................................................	583
44.2.1 Configuring a Filter Rule .......................................................................		584
44.2.2 Configuring a TCP/IP Filter Rule ..........................................................		585
44.2.3 Configuring a Generic Filter Rule .........................................................		587
44.3	Example Filter ................................................................................................	589
44.4	Filter Types and NAT ......................................................................................	591
44.5	Firewall Versus Filters ....................................................................................	591
44.6	Applying a Filter ............................................................................................	592
44.6.1 Applying LAN Filters .............................................................................		592
44.6.2 Applying DMZ Filters ............................................................................		592
44.6.3 Applying Remote Node Filters ..............................................................		593

23 Table of Contents