User's Manual

Contents xi
202-10005-05, June 2005
Appendix E
Virtual Private Networking
What is a VPN? ............................................................................................................. E-1
What Is IPSec and How Does It Work? ......................................................................... E-2
IPSec Security Features ......................................................................................... E-2
IPSec Components ................................................................................................. E-2
Encapsulating Security Payload (ESP) ................................................................... E-3
Authentication Header (AH) .................................................................................... E-4
IKE Security Association ......................................................................................... E-4
Mode ................................................................................................................. E-5
Key Management .................................................................................................... E-6
Understand the Process Before You Begin ................................................................... E-6
VPN Process Overview ................................................................................................. E-7
Network Interfaces and Addresses ......................................................................... E-7
Interface Addressing ......................................................................................... E-7
Firewalls ........................................................................................................... E-8
Setting Up a VPN Tunnel Between Gateways ........................................................ E-8
VPNC IKE Security Parameters .................................................................................. E-10
VPNC IKE Phase I Parameters ............................................................................. E-10
VPNC IKE Phase II Parameters .............................................................................E-11
Testing and Troubleshooting .........................................................................................E-11
Additional Reading .......................................................................................................E-11
Appendix F
NETGEAR VPN Configuration
MBR814 to FVL328 ........................................................................................................F-1
Configuration Profile .................................................................................................F-1
Step-By-Step Configuration ......................................................................................F-2
MBR814 with FQDN to FVL328 .....................................................................................F-6
Configuration Profile .................................................................................................F-6
The Use of a Fully Qualified Domain Name (FQDN) .........................................F-7
Step-By-Step Configuration ......................................................................................F-8
Configuration Summary (Telecommuter Example) .......................................................F-13
Setting Up the Client-to-Gateway VPN Configuration (Telecommuter Example) .........F-14
Step 1: Configuring the Client-to-Gateway VPN Tunnel on the VPN Router at the
Employer’s Main Office ..........................................................................................F-14