Billion BiPAC 8700VAX(L)-1600 User Manual page 251

Example: Configuring a LAN-to-LAN PPTP VPN Connection
The branch office establishes a PPTP VPN tunnel with head office to connect two private networks
over the Internet. The routers are installed in the head office and branch offices accordingly.
Server side: Head Office
The above is the common setting for PPTP Server, set as you like for authentication and encryption.
The settings in Client side should be in accordance with settings in Server side.
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