Boot a Bering floppy image. Once the LEAF menu appears get access to
the linux shell by (q)uitting the menu. Edit the
lrpkg.cfg file and REPLACE the dhcpcd entry by
ppp,pptp in the list of packages to be loaded at boot. Check the
Bering-uClibc Installation
Guide to learn how to do that.
Your lrpkg.cfg file will then look like (adjust
to your tastes):
root,etc,local,modules,iptables,ppp,pptp,keyboard,shorwall,ulogd,dnscache,weblet
The line ("root ... dnscache,weblet") must be typed as a single
one in lrpkg.cfg
The ppp package is provided on the standard Bering-uClibc floppy. The pptp.lrp package is available here. http://leaf.sourceforge.net/doc/guide/buci-install.html