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Virtual Private Networking

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Chapter 7 Virtual Private Networking This chapter describes how to use the virtual private networking (VPN) features of the ADSL Modem Wireless Router. VPN communications paths are called tunnels. VPN tunnels provide secure, encrypted communications between your local network and a remote network or computer. See "Virtual Private Networking (VPN)" in Appendix C to learn more about VPN. This chapter is organized as follows: • "Overview of VPN Configuration" on page 7-2 provides an overview of the two most common VPN configurations: Client-to-Gateway and Gateway-to-Gateway. • "Planning a VPN" on page 7-4 provides a worksheet for recording the configuration parameters of the VPN you want to set up, along with the VPN Committee (VPNC) recommended default parameters set by the VPN Wizard. • "VPN Tunnel Configuration" on page 7-6 summarizes the three ways to configure a VPN tunnel: VPN Wizard (recommended for most situations), Auto Policy, and Manual Policy. • "How to Set Up a Client-to-Gateway VPN Configuration" on page 7-7 provides the steps needed to configure a VPN tunnel between a remote PC and a network gateway using the VPN Wizard and the NETGEAR ProSafe VPN Client. • "How to Set Up a Gateway-to-Gateway VPN Configuration" on page 7-21 provides the steps needed to configure a VPN tunnel between two network gateways using the VPN Wizard. • "VPN Tunnel Control" on page 7-29 provides the step-by-step procedures for activating, verifying, deactivating, and deleting a VPN tunnel once the VPN tunnel has been configured. • "How to Set Up VPN Tunnels in Special Circumstances" on page 7-38 provides the steps needed to configure VPN tunnels when there are special circumstances and the VPNC recommended defaults of the VPN Wizard are inappropriate. The two alternatives for configuring VPN tunnels are Auto Policy and Manual Policy. Virtual Private Networking 7-1 v1.0, January 2006

Section	Page
Reference Manual for the ADSL Modem Wireless Router DG834G	1
Contents	7
Chapter 1 About This Manual	13
Audience, Scope, Conventions, and Formats	13
How to Print this Manual	14
Chapter 2 Introduction	17
About the Modem Router	17
Key Features	18
A Powerful, True Firewall	18
802.11 Standards-based Wireless Networking	19
Easy Installation and Management	19
Protocol Support	20
Virtual Private Networking (VPN)	21
Auto Sensing and Auto Uplink™ LAN Ethernet Connections	21
Content Filtering	22
Trend Micro Home Network Security	22
What’s in the Box?	23
The Router’s Front Panel	24
The Router’s Rear Panel	25
Connecting the Router to the Internet	26
Chapter 3 Wireless Configuration	27
Considerations for a Wireless Network	27
Observe Performance, Placement, and Range Guidelines	27
Implement Appropriate Wireless Security	28
Understanding Wireless Settings	29
How to Set Up and Test Basic Wireless Connectivity	32
How to Restrict Wireless Access to Your Network	33
Choosing WEP Authentication and Security Encryption Methods	36
How to Configure WEP	38
How to Configure WPA-PSK	39
How to Configure WPA-802.1x	40
Chapter 4 Protecting Your Network	41
Protecting Access to Your 54 Mbps ADSL Modem Wireless Router Model DG834G	41
How to Change the Built-In Password	41
Changing the Administrator Login Timeout	42
Configuring Basic Firewall Services	43
Blocking Keywords, Sites, and Services	43
How to Block Keywords and Sites	43
Firewall Rules	45
Inbound Rules (Port Forwarding)	46
Outbound Rules (Service Blocking)	49
Order of Precedence for Rules	51
Services	52
How to Define Services	52
Setting Times and Scheduling Firewall Services	53
How to Set Your Time Zone	53
How to Schedule Firewall Services	55
Trend Micro Home Network Security	55
Security Service Settings	56
Parental Controls Settings	58
Chapter 5 Managing Your Network	63
Backing Up, Restoring, or Erasing Your Settings	63
How to Back Up the Configuration to a File	63
How to Restore the Configuration from a File	64
How to Erase the Configuration	64
Upgrading the Modem Router’s Firmware	64
How to Upgrade the Modem Router Firmware	65
Network Management Information	66
Viewing Modem Router Status and Usage Statistics	66
Viewing Attached Devices	71
Viewing, Selecting, and Saving Logged Information	71
Examples of Log Messages	74
Enabling Security Event E-mail Notification	75
Running Diagnostic Utilities and Rebooting the Modem Router	77
Enabling Remote Management	78
Configuring Remote Management	78
Chapter 6 Advanced Configuration	81
Configuring Advanced Security	81
Setting Up A Default DMZ Server	82
Connect Automatically, as Required	83
Disable Port Scan and DOS Protection	83
Respond to Ping on Internet WAN Port	84
MTU Size	84
Configuring LAN IP Settings	84
DHCP	86
How to Configure LAN TCP/IP Settings	88
Configuring Dynamic DNS	89
How to Configure Dynamic DNS	89
Using Static Routes	91
Static Route Example	91
How to Configure Static Routes	92
Universal Plug and Play (UPnP)	93
Chapter 7 Virtual Private Networking	95
Overview of VPN Configuration	96
Client-to-Gateway VPN Tunnels	96
Gateway-to-Gateway VPN Tunnels	97
Planning a VPN	98
VPN Tunnel Configuration	100
How to Set Up a Client-to-Gateway VPN Configuration	101
Step 1: Configuring the Client-to-Gateway VPN Tunnel on the DG834G v3	101
Step 2: Configuring the NETGEAR ProSafe VPN Client on the Remote PC	106
How to Set Up a Gateway-to-Gateway VPN Configuration	115
VPN Tunnel Control	123
Activating a VPN Tunnel	123
Verifying the Status of a VPN Tunnel	127
Deactivating a VPN Tunnel	129
Deleting a VPN Tunnel	131
How to Set Up VPN Tunnels in Special Circumstances	132
Using Auto Policy to Configure VPN Tunnels	132
Using Manual Policy to Configure VPN Tunnels	142
Chapter 8 Troubleshooting	145
Basic Functioning	145
Power LED Not On	146
Test LED Never Turns On or Test LED Stays On	146
LAN or Internet Port LEDs Not On	146
Troubleshooting the Web Configuration Interface	147
Troubleshooting the ISP Connection	148
ADSL link	148
Obtaining a WAN IP Address	149
Troubleshooting PPPoE or PPPoA	150
Troubleshooting Internet Browsing	151
Troubleshooting a TCP/IP Network Using the Ping Utility	151
Testing the LAN Path to Your Router	151
Testing the Path from Your Computer to a Remote Device	152
Restoring the Default Configuration and Password	153
Using the Reset button	153
Problems with Date and Time	153
Appendix A Technical Specifications	155
Appendix B NETGEAR VPN Configuration	157
DG834G v3 to FVL328	157
Configuration Profile	157
Step-By-Step Configuration	158
DG834G v3 with FQDN to FVL328	162
Configuration Profile	162
Step-By-Step Configuration	164
Configuration Summary (Telecommuter Example)	170
Setting Up the Client-to-Gateway VPN Configuration (Telecommuter Example)	170
Step 1: Configuring the Client-to-Gateway VPN Tunnel on the VPN Router at the Employer’s Main Office	171
Step 2: Configuring the NETGEAR ProSafe VPN Client on the Remote PC at the Telecommuter’s Home Office	174
Monitoring the VPN Tunnel (Telecommuter Example)	184
Viewing the PC Client’s Connection Monitor and Log Viewer	184
Viewing the VPN Router’s VPN Status and Log Information	185