Windows XP includes a native client that lets you manage your VPN L2TP/IPSec connections.
1- Configuring a new VPN L2TP/IPSec connection with the Windows XP native client
Start by opening the Control Panel.
Open the "Network and Internet Connections" category.
Select "Create a connection to the network at your workplace".
Select "Virtual Private Network connection".
Give a meaningful name to your new VPN connection.
During this step, you will have to specify your Cisco ASA firewall’s IP address.
In the New Connection Wizard, please make sure the check the box if you wish to create a shortcut.
To finish configuring your connection, re-open the Network and Internet Connections page, and select "Network Connections".
Select your connection, right-click, and select the “Properties” menu item.
In the “Security” tab, select the following options.
Click on the "IPSec Settings" button, and place a checkmark in the "Pre-shared key" option.
You will need the shared key ("Pre-shared key") that was given to your by your firewall/VPN administrator.
On the "Networking" tab, select the following options:
- VPN Type : L2TP/IPSec
2 Connect to the VPN
- Click on "Connect to a network", select your connection and click on "Connect".
- Enter the username and password that were given to you by your firewall/VPN administrator and click “Connect”.
- The VPN connection should be established.
You can test your VPN connection by attempting to ping.
3- Disconnect from the VPN
- If you experience problems with your VPN connection
a- Make sure your computer is connected to the internet.
b- Make sure that you followed the connection instructions (described above), double-check as required.
c- Make sure that the connection credentials you are using are valid and are those that your firewall/VPN administrator gave you (firewall IP address, username, password, shared key) If the problem persists, contact your firewall/VPN administrator.