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4.11 PPTP VPN
ConsoleServerswithFirmwareV3.5.2andlater,includeaPPTP(Point-to-PointTunnelingProtocol)server.PPTPistypically
used for communications over a physical or virtual serial link. The PPP endpoints define a virtual IP address to themselves.
RoutestonetworkscanthenbedenedwiththeseIPaddressesasthegateway,whichresultsintrafcbeingsentacrossthe
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
connectingsingleremoteWindowsclients.Ifyoutakeyourportablecomputeronabusinesstrip,youcandialalocalnumber
toconnecttoyourInternetserviceprovider(ISP)andthencreateasecondconnection(tunnel)intoyourofcenetworkacross
theInternetandhavethesameaccesstoyourcorporatenetworkasifyouwereconnecteddirectlyfromyourofce.Similarly,
telecommuterscanalsosetupaVPNtunnelovertheircablemodemorDSLlinkstotheirlocalISP.
To set up a PPTP connection from a remote Windows client to your appliance and local network:
1. EnableandcongurethePPTPVPNserveronyourappliance
2. SetupVPNuseraccountsonyourapplianceandenabletheappropriateauthentication
3. ConguretheVPNclientsattheremotesites.TheclientdoesnotrequirespecialsoftwareasthePPTPServersupports
thestandardPPTPclientsoftwareincludedwithWindowsXP/NT/2000/7andVista
4. ConnecttotheremoteVPN
Chapter 4: Serial Port, Device and User Configuration