Billion BiPAC 7402NX User Manual page 134

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.
Attention
Chapter 4: Configuration
Billion BiPAC 7402NX(L) 802.11n 3G/ADSL2+ (VPN) Firewall Router
Both office LAN networks MUST in different subnet with LAN to LAN application.
Functions of Pre-shared Key, VPN Connection Type and Security Algorithm
MUST BE identically set up on both sides.
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