NETGEAR ADSL Firewall Router DG834 - Manual (Page 11)

Contents xi
202-10005-05, June 2005
Appendix D
Virtual Private Networking
What is a VPN? ............................................................................................................. D-1
What Is IPSec and How Does It Work? ......................................................................... D-2
IPSec Security Features ......................................................................................... D-2
IPSec Components ................................................................................................. D-2
Encapsulating Security Payload (ESP) ................................................................... D-3
Authentication Header (AH) .................................................................................... D-4
IKE Security Association ......................................................................................... D-4
Mode ................................................................................................................. D-5
Key Management .................................................................................................... D-6
Understand the Process Before You Begin ................................................................... D-6
VPN Process Overview ................................................................................................. D-7
Network Interfaces and Addresses ......................................................................... D-7
Interface Addressing ......................................................................................... D-7
Firewalls ........................................................................................................... D-8
Setting Up a VPN Tunnel Between Gateways ........................................................ D-8
VPNC IKE Security Parameters .................................................................................. D-10
VPNC IKE Phase I Parameters ............................................................................. D-10
VPNC IKE Phase II Parameters ............................................................................ D-11
Testing and Troubleshooting ........................................................................................ D-11
Additional Reading ...................................................................................................... D-11
Appendix E
NETGEAR VPN Configuration
DG834 to FVL328 .......................................................................................................... E-1
Configuration Profile ................................................................................................ E-1
Step-By-Step Configuration ..................................................................................... E-2
DG834 with FQDN to FVL328 ....................................................................................... E-6
Configuration Profile ................................................................................................ E-6
The Use of a Fully Qualified Domain Name (FQDN) ........................................ E-7
Step-By-Step Configuration ..................................................................................... E-8
Configuration Summary (Telecommuter Example) ...................................................... E-13
Setting Up the Client-to-Gateway VPN Configuration (Telecommuter Example) ........ E-14
Step 1: Configuring the Client-to-Gateway VPN Tunnel on the VPN Router at the
Employer’s Main Office ......................................................................................... E-15