Billion BiPAC 8900X R3 User Manual page 199

Example: Configuring L2TP LAN-to-LAN VPN Connection
The branch office establishes a L2TP VPN tunnel with head office to connect two private networks
over the Internet. The routers are installed in the head office and branch office accordingly.
Note: Both office LAN networks must be in different subnets with the LAN-LAN application.
Server side: Head Office
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