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| Configure L2TP in Windows 2000 |
| The Layer Two Tunneling Protocol (L2TP) is a VPN protocol that was designed to combine the best |
| features of Point-to-Point Tunneling Protocol (PPTP) and the Layer Two Forwarding (L2F) |
| protocol. It operates at Layer 2 in the ISO-OSI model and can use various wide area network media |
| (such as Frame Relay) without an IP transport layer. When used on an IP network, L2TP uses User |
| Datagram Protocol (UDP) for data transmission. It relies on IPSec for encryption services; this is |
| referred to as L2TP over IPSec. |
| L2TP is a component of Windows 2000 Routing And Remote Access Services, which is installed by |
| default on all Windows 2000 Server computers. Like PPTP, L2TP has to be enabled and configured |
| separately. L2TP is enabled just like PPTP--through the Enable Routing And Remote Access wizard |
| in the Routing And Remote Access console. |
| After the wizard is complete, both PPTP and L2TP are enabled and configured with the same |
| settings. To change L2TP settings, right-click on the Ports node in the Routing And Remote Access |
| console and select Properties. In the list box, select WAN Miniport (L2TP) and click the Configure |
| Enable and disable inbound remote access connections. |
| Enable and disable inbound and outbound demand-dial routing. |
| Set a phone number for this device, if applicable. |
| Set the number of ports that are accepting connections. |
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