Do you have any firewall behind the billion bipac ? if yes just configure PPPoA connection in WAN Disable DHCP Server and NAT. Aim of this article: This article will describe how to connect the Billion BIPAC SHDSL router to the Internet in Routed IP mode. The BiPAC / series is ideally designed for small businesses to use as a substitute for local leased lines. As a substitute of a local leased line, the.