Billion BiPAC 8500/8520 User Manual page 127

Billion BiPAC SHDSL/SHDSL.bis (VPN) Firewall Bridge/ Router
Example: Configuring a L2TP VPN - Remote Access Dial-in Connection
A remote worker establishes a L2TP VPN connection with the head office using Microsoft VPN
Adapter (included with Windows XP/2000/ME, etc.). The router is installed in the head office,
connecting to a couple of PCs and Servers.
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Chapter 4: Configuration