For the purposes of testing an L2TP connection, or to deploy a limited L2TP infrastructure
using a pre-shared key, use the following procedure:
1. Open the ISA Server Management Console.
2. Select the Virtual Private Networking (VPN) node from the Scope pane.
3. Click on Select Authentication Methods from the Tasks pane.
4. In the Authentication tab, check Allow Custom IPSec Policy for L2TP Connection.
5. Enter the desired key, similar to the image shown in Figure 9.19.
FIGURE 9.18 Enabling L2TP VPN client access.
248 CHAPTER 9 Enabling Client Remote Access with ISA Server 2006 VPNs
6. Press OK to close the window, and then press Apply to save and apply the new
configuration.
Configuring a Windows XP Professional Client for an L2TP VPN
Connection
The following process can be used to configure a remote Windows XP workstation for
standard L2TP communication. For automatic provisioning of this VPN connection, see
the later section of this chapter that details the use of the Connection Management
Administration Kit (CMAK) to create automatic VPN connections.
1. Log on to the system and open Create a new connection from the Control Panel.
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