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• VPN name is for the user to identify the VPN configuration.
• Set VPN server is the USG’s WAN IP address.
• Set IPSec pre-shared key is the pre-shared key of the IPSec VPN gateway the USG uses for
L2TP VPN over IPSec (top-secret in this example).
• Enable L2TP secret turn this off.
• DNS search domain leave this on.
• When dialing the L2TP VPN, the user will have to enter his account and password.
3.6.4 Configuring L2TP VPN in iOS
To configure L2TP VPN in an iOS device, go to Settings > VPN > Add VPN Configuration > L2TP
and configure as follows.
• Description is for the user to identify the VPN configuration.
• Server is the USG’s WAN IP address.
• Account is the user’s account for using the L2TP VPN (L2TP-test in this example).
• RSA SecurID leave this off.
• Password is the password for the user’s account.
• Secret is the pre-shared key of the IPSec VPN gateway the USG uses for L2TP VPN over
IPSec (top-secret in this example).
• Send All Traffic leave this on.
• Proxy leave this off.
3.6.5 Configuring L2TP VPN in Windows
The following sections cover how to configure L2TP in remote user computers using Windows 7,
Vista, or XP.
3.6.5.1 Configuring L2TP in Windows 7 or Windows Vista
Do the following to establish an L2TP VPN connection.
Create a Connection Object
1 Open the Network and Sharing Center screen.
Windows 7: click Start > Control Panel > View network status and tasks > Set up a new
connection or network.
Windows Vista: click Start > Network > Network and Sharing Center > Set up a connection or
network).
2 Select Connect to a workplace and click Next.
3 Select Use my Internet connection (VPN).
4 For the Internet address enter the My Address domain name or WAN IP address of the VPN
gateway the USG is using for L2TP VPN (172.16.1.2 in this example).
4a For the Destination name, specify a name to identify this VPN (L2TP to USG for
example).
4b Select Don’t connect now, just set it up so I can connect later and click Next.
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