ZyXEL Communications 310 PART II: ADVANCED APPLICATIONS, Chapter 7 Filter Configuration, Chapter 6 Network Address Translation (NAT)

Prestige 310 Broadband Sharing Gateway

3.4	Internet Test Setup ........................................................................................................................		3-13
3.5	Basic Setup Complete ...................................................................................................................		3-13
PART II: ADVANCED APPLICATIONS ....................................................................................................			II
Chapter 4 Remote Node Setup.....................................................................................................................			4-1
4.1	Remote Node Profile.......................................................................................................................		4-1
4.1.1		Ethernet Encapsulation ...........................................................................................................	4-1
4.2	PPTP Encapsulation........................................................................................................................		4-3
4.2.1		PPPoE Encapsulation..............................................................................................................	4-4
4.3	Editing TCP/IP Options (with Ethernet Encapsulation)..................................................................		4-6
4.3.1		Editing TCP/IP Options (with PPTP Encapsulation)..............................................................	4-8
4.3.2		Editing TCP/IP Options (with PPPoE Encapsulation) ..........................................................	4-10
4.4	Remote Node Filter.......................................................................................................................		4-10
4.5	Traffic Redirect .............................................................................................................................		4-11
4.5.1		Traffic Redirect Setup...........................................................................................................	4-12
Chapter 5 IP Static Route Setup..................................................................................................................			5-1
5.1	IP Static Route Setup ......................................................................................................................		5-2
Chapter 6 Network Address Translation (NAT) ........................................................................................			6-1
6.1	Introduction.....................................................................................................................................		6-1
6.1.1		NAT Definitions .....................................................................................................................	6-1
6.1.2		What NAT Does .....................................................................................................................	6-2
6.1.3		How NAT Works....................................................................................................................	6-2
6.1.4		NAT Application ....................................................................................................................	6-3
6.1.5		NAT Mapping Types ..............................................................................................................	6-4
6.2	Using NAT ......................................................................................................................................		6-5
6.2.1		SUA (Single User Account) Versus NAT ..............................................................................	6-5
6.2.2		Applying NAT ........................................................................................................................	6-6
6.3	NAT Setup.......................................................................................................................................		6-7
6.3.1		Address Mapping Sets ............................................................................................................	6-8
6.4	NAT Server Sets – Port Forwarding..............................................................................................		6-12
6.4.1		Configuring a Server behind NAT........................................................................................	6-13
6.5	General NAT Examples ................................................................................................................		6-15
6.5.1		Example 1: Internet Access Only..........................................................................................	6-15
6.5.2		Example 2: Internet Access with an Inside Server................................................................	6-16
6.5.3		Example 3: Multiple Public IP Addresses With Inside Servers ............................................	6-17
6.5.4		Example 4: NAT Unfriendly Application Programs.............................................................	6-21
6.6	Trigger Port Forwarding ...............................................................................................................		6-22
6.6.1		Two Points To Remember About Trigger Ports ...................................................................	6-23
6.6.2		Trigger Port Forwarding Process ..........................................................................................	6-24
PART III: ADVANCED MANAGEMENT.................................................................................................			III
Chapter 7 Filter Configuration ...................................................................................................................			7-1
7.1	About Filtering................................................................................................................................		7-1

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