Matthias Scheler wrote :
| PPTP is Microsoft's IP tunneling protocol for building VPNs. The protocol
| used for A-DSL modem is called PPPoE (PPP over ethernet). You can find
| an userland PPPoE implementation for NetBSD in "pkgsrc/net/rp-pppoe".

But the modems for the french ADSL use the pptp protocol (for the moment)