Вот первая тема. VPN настроил по инструкции, подставил свои настройки, добавил опции debug и dump, получил:
Script pptp 10.0.1.1 --nolaunchpppd --nobuffer finished (pid 9069), status = 0x1
using channel 274
Using interface ppp0
Connect: ppp0 <--> /dev/pts/0
sent [LCP ConfReq id=0xe <asyncmap 0x0> <magic 0xe75de149> <pcomp> <accomp>]
anon warn[pptp_gre_bind:pptp_gre.c:100]: connect: Network is unreachable
anon fatal[main:pptp.c:318]: Cannot bind GRE socket, aborting.
Modem hangup
Connection terminated.