In this
example, we are opening the tunnel to all traffic, so we select the drop-down box
and choose All Outbound Traffic. Click Next to continue.
FIGURE 10.10 Entering an L2TP pre-shared key.
292 CHAPTER 10 Extending ISA 2006 to Branch Offices with Site-to-Site VPNs
15. Click Finish, Apply, and OK to save the changes.
16. Repeat the procedure on the remote site server.
After the L2TP remote site networks have been created on each server, test the connectivity
between sites and monitor site session traffic by clicking the Monitor Site Sessions link
in the Tasks pane. Traffic will appear under the Sessions tab of the Monitoring node, as
shown in Figure 10.11.
Configuring ISA 2006 to Integrate with Third-Party
VPN Tunnel Products
If the remote network is connected to a non-Microsoft third-party VPN product, the IPSec
Tunnel Mode option is the only protocol that can be supported. Fortunately, using IPSec
Tunnel Mode to set up a remote site network is relatively straightforward.
Setting Up an IPSec Tunnel Mode VPN Connection
As with L2TP over IPSec protocol methods, IPSec in Tunnel Mode can be set up to use
either certificates-based authentication or shared-key methods.
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