Opengear ACM5000, User Manual

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Chapter 4: Serial Port, Device and User Configuration
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Console Server & RIM Gateway User Manual
4.11 PPTP VPN
The ACM5500, ACM5000, IM4004-5 and IM4200 family of IM42xx advanced console servers with Firmware V3.5.2 and
later, include a PPTP (Point-to-Point Tunneling Protocol) server. PPTP is typically used for communications over a
physical or virtual serial link. The PPP endpoints define a virtual IP address to themselves. Routes to networks can then
be defined with these IP addresses as the gateway, which results in traffic being sent across the tunnel. PPTP establishes
a tunnel between the physical PPP endpoints and securely transports data across the tunnel.
The strength of PPTP is its ease of configuration and integration into existing Microsoft infrastructure. It is generally used
for connecting single remote Windows clients. If you take your portable computer on a business trip, you can dial a local
number to connect to your Internet access service provider (ISP) and then create a second connection (
tunnel ) into your
office network across the Internet and have the same access to your corporate network as if you were connected directly
from your office. Similarly, telecommuters can also set up a VPN tunnel over their cable modem or DSL links to their local
ISP.
To set up a PPTP connection from a remote Windows client to your Opengear appliance and local network:
1. Enable and configure the PPTP VPN server on your Opengear appliance
2. Set up VPN user accounts on the Opengear appliance and enable the appropriate authentication
3. Configure the VPN clients at the remote sites. The client does not require special software as the PPTP Server
supports the standard PPTP client software included with Windows XP/ NT/ 2000/ 7 and Vista
4. Connect to the remote VPN
4.11.1 Enable the PPTP VPN server

Select PPTP VPN on the Serial & Networks menu