We assume here that you want to connect your LEAF router to the Internet via an Alcatel SpeedTouch home ADSL modem which supports both PPPoE and PPPoA connections. The PPPoE connection is covered in another section. For the PPPoA connection, we assume that your modem is connected to a dedicated NIC as eth0 and will communicate with your router through the pptp protocol. What is described here corresponds to section 3.2.5 of the DSL How-To document. The traffic to your internal network goes through eth0 while access to the Internet via PPPoA goes through ppp0.

The PPP-Howto, the PPTP-Client project and the DSL-Howto are two useful references for this section.

Thanks to Eric de Thouars who suggested the required adjustment to Shorewall for this setup to work properly. Comments on this section should be addressed to its maintainer: Eric Spakman <espakman at users.sourceforge.net>.