M2M IDG500AM-0T001 User Manual page 202

M2M Cellular Gateway
5.5.5 PPTP
The Point‐to‐Point Tunneling Protocol (PPTP) is a method for implementing virtual private
networks. PPTP uses a control channel over TCP and a GRE tunnel operating to encapsulate PPP
packets. The PPTP specification does not describe encryption or authentication features and relies on
the Point‐to‐Point Protocol being tunneled to implement security functionality. However, the most
common PPTP implementation shipping with the Microsoft Windows product families implements
various levels of authentication and encryption natively as standard features of the Windows PPTP
stack. The intended use of this protocol is to provide security levels and remote access levels
comparable with typical VPN products.
Deploy a security gateway for local office and establish a virtual private network with the remote
gateway of another office by using PPTP tunneling. So, all client hosts behind local security gateway
can make data communication with others behind remote gateway.
Or when you are a mobile user with a notebook or carrying along a security gateway and you want
to access the servers and database in company headquarters (HQ). In addition, the security gateway in
HQ supports the PPTP VPN server function. So you can dial in the HQ gateway and access the HQ
resources by establishing a PPTP VPN tunnel. It is a virtual private network between your device and
HQ gateway for your resource accessing.
In "PPTP" page, there is the "Configuration" window to enable the PPTP VPN function. Moreover,
the security gateway can play either "PPTP Server" role or "PPTP Client" role or they both at the same
Index skipping is used to reserve slots for new function insertion, when required.
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