Cisco Cisco ASA 5505 Adaptive Security Appliance Manual Técnica

L2TP/IPSec client (Windows 8)

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The information in this document was created from the devices in a specific lab environment. All of
the devices used in this document started with a cleared (default) configuration. If your network is
live, ensure that you understand the potential impact of any command.

This configuration can also be used with Cisco ASA 5500 series Security Appliance 8.3(1) or later.

Refer to 

 for more information on document conventions

Layer 2 Tunneling Protocol (L2TP) is a VPN tunneling protocol that allows remote clients to use
the public IP network to securely communicate with private corporate network servers. L2TP uses
PPP over UDP (port 1701) to tunnel the data.

L2TP protocol is based on the client/server model. The function is divided between the L2TP
Network Server (LNS), and the L2TP Access Concentrator (LAC). The LNS typically runs on a
network gateway such as the ASA in this case, while the LAC can be a dial-up Network Access
Server (NAS) or an endpoint device with a bundled L2TP client such as Microsoft Windows, Apple
iPhone, or Android.

This section is presented with the information to configure the features described in this document.

Note: Use the 

 (

 customers only) to find more information

on the commands used in this document.

Note: The IP addressing schemes used in this configuration are not legally routable on the
Internet. They are RFC 1918 addresses that have been used in a lab environment.