Users Guide

Table Of Contents
Dell PowerConnect W-Series ArubaOS 6.1 | User Guide Virtual Private Networks | 389
Chapter 17
Virtual Private Networks
Wireless networks can use virtual private network (VPN) connections to further secure wireless data from
attackers. The Dell controller can be used as a VPN concentrator that terminates all VPN connections from both
wired and wireless clients.
This chapter describes the following topics:
“Planning a VPN Configuration” on page389
“VPN Authentication Profiles” on page392
“Configuring a Basic VPN for L2TP/IPsec” on page393
“Configuring a VPN for L2TP/IPsec with IKEv2” on page397
“Configuring a VPN for Smart Card Clients” on page401
“Configuring a VPN for Clients with User Passwords” on page402
“Configuring Remote Access VPNs for XAuth” on page403
“Remote Access VPNs for PPTP” on page405
“Site-to-Site VPNs” on page406
“VPN Dialer” on page411
Planning a VPN Configuration
You can configure the controller for the following types of VPNs:
Remote access VPNs allow hosts (for example, telecommuters or traveling employees) to connect to private
networks (for example, a corporate network) over the Internet. Each host must run VPN client software which
encapsulates and encrypts traffic and sends it to a VPN gateway at the destination network. The controller
supports the following remote access VPN protocols:
Layer-2 Tunneling Protocol over IPsec (L2TP/IPsec)
Point-to-Point Tunneling Protocol (PPTP)
XAUTH IKE/IPsec
IKEv2 with Certificates
IKEv2 with EAP
Site-to-site VPNs allow networks (for example, a branch office network) to connect to other networks (for
example, a corporate network). Unlike a remote access VPN, hosts in a site-to-site VPN do not run VPN client
software. All traffic for the other network is sent and received through a VPN gateway which encapsulates and
encrypts the traffic.
Before enabling VPN authentication, you must configure the following:
The default user role for authenticated VPN clients. See Chapter 12, “Roles and Policies” for information
about configuring user roles.
The authentication server group the controller will use to validate the clients. See Chapter 9, “Authentication
Servers” for configuration details.
NOTE: A server-derived role, if present, takes precedence over the default user role.