Something like: # cat hostname.pppoe0 pppoedev vr0 authproto chap authname 'u...@on.net' authkey 'pass' up inet 0.0.0.0 255.255.255.255 dest 0.0.0.1 !/sbin/route -v add -inet default -ifp pppoe0 0.0.0.1
See: man -s 4 pppoe http://www.openbsd.org/cgi-bin/man.cgi?query=pppoe&sektion=4