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5.11 PPTP VPN
The LES1600, LES1516A, LES1532A, LES1548A, and LES1700 family of 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.
Internet
FIGURE 5-34. PPTP VPN
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 Black Box appliance and local network:
Enable and configure the PPTP VPN server on your Black Box appliance.
Set up VPN user accounts on the Black Box appliance and enable the appropriate authentication.
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 NT and later.
Connect to the remote VPN.
CHAPTER 5: SERIAL PORT, HOST DEVICE AND USER CONFIG
