Motorola MG8702 User Manual page 67

A couple of notes about VPN options. IPsec uses encryption and
provides the strongest security. PPTP is considered to be the least
secure VPN option. PPTP connections are not required to include
encryption or authentication. L2TP is based on PPTP, and adds
some level of compulsory authentication.
In the implementation of PPTP and L2TP on the MG8702, MPPE
encryption is optional. Both protocols require a login; L2TP requires
a passkey for authentication.
There are three pages under VPN in the MG8702 configuration
manager: IPsec, L2TP/PPTP and Event Log. Use the IPsec page to
set up an endpoint for a site to site IPsec connection. Use the
PPTP/L2TP page to set up a server for a set of remote clients that
connect via PPTP or L2TP. You may find the Event Log useful to
determine what has gone wrong if you have trouble setting up a
VPN.
For details on how to configure a VPN on the MG8702, follow the
help available through the information icons on the configuration
manager pages.
When the MG8702 is configured as a VPN endpoint, devices that
connect to the endpoint will need to know the IP Address of the
MG8702. You can find this address on the StatusàConnections page.
To provide the most stable VPN connections, the MG8702's router
should be provisioned with a static IP Address. You will need to
order this from your cable service provider.
The VPN implementations on the MG8702 are best effort. They are
also Windows-centric. You will have to verify suitability for your own
environment.