The most secure VPN connections, however, can be set up using the L2TP
protocol, which uses a combination of user and computer authentication. L2TP is
described in more detail later in this chapter.
Configuring an ISA VPN Connection to Use PPTP
The following process can be used to enable PPTP VPN support on the ISA VPN server:
1. Open the ISA Server Management Console and select Virtual Private Networks (VPN)
from the Scope pane.
FIGURE 9.15 Modifying RADIUS server settings for VPN client access.
244 CHAPTER 9 Enabling Client Remote Access with ISA Server 2006 VPNs
2. Select the VPN Clients tab in the Details pane.
3. Select Configure VPN Client Access from the Tasks pane.
4. On the Protocols tab, enable the Enable PPTP check box, as shown in Figure 9.16.
5. Select the OK button to close the window.
6. Select the Apply button to apply the new configuration.
Configuring a Windows XP Professional Client for PPTP
Communication
There are two methods for creating VPN connections for clients. The first method is by
using the Connection Management Administration Kit (CMAK) to create a custom profile
that can be automatically configured on client workstations.
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