Users Guide

Table Of Contents
Dell PowerConnect ArubaOS 5.0 | User Guide] Virtual Private Networks | 347
For wireless networks, virtual private network (VPN) connections can be used to further secure the 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:
z “VPN Configuration” on page347
z “Remote Access VPN for L2TP IPsec” on page349
z “Remote Access VPNs for XAuth” on page355
z “Remote Access VPN for PPTP” on page362
z “Site-to-Site VPNs” on page362
z “Dell Dialer” on page366
VPN Configuration
You can configure the controller for the following types of VPNs:
z 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)
z 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:
z The default user role for authenticated VPN clients. See Chapter 10, “Roles and Policies” for information
about configuring user roles.
z The authentication server group the controller will use to validate the clients. See Chapter 8, “Authentication
Servers” for configuration details.
You then specify the default user role and authentication server group in the VPN authentication default profile,
as described in the following sections.
Note: A server-derived role, if present, takes precedence over the default user role.
Chapter 15
Virtual Private Networks