
PPTP and L2TP VPNs
Using PPTP and L2TP Virtual Private Networking (VPN), you can create a secure connection between a client computer running Microsoft Windows and your internal network.
PPTP is a Windows VPN standard. You can use PPTP to connect computers running Windows to a
L2TP combines Windows PPTP functionality with IPSec security. L2TP is supported by most recent versions of Windows.
VPNs protect data passing through the secure tunnel by encrypting it to guarantee confidentiality. In addition, authentication guarantees that the data originated from the claimed sender and was not damaged or altered in transit. When the client computer is connected to the VPN tunnel, it seems to the user that the client computer is directly connected to the internal network.
PPTP and L2TP VPNs are only supported in NAT/Route mode.
This chapter describes:
•PPTP VPN configuration
•L2TP VPN configuration
PPTP VPN configuration
PPTP clients must be able to authenticate with the
After you have added a user group, configure your
Add firewall policies with an external source address to control the access that PPTP clients have through the
Add the addresses in the PPTP address range to the external interface address list. To make policy configuration easier, you can create an address group for PPTP that contains the IP addresses that can be assigned to PPTP clients from the PPTP address range.
Add addresses to the internal interface address list to control the addresses to which PPTP clients can connect.
You create Ext
Set the service for the policy to the traffic type inside the PPTP VPN tunnel. For example, if you want PPTP clients to be able to access a web server, set service to HTTP.
Make sure that your ISP supports PPTP connections.
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