у меня та же ошибка, vpn валится при подсоединении к удаленному серверу
Nov 2 08:38:38 pppd_L2TP0
creating in-kernel L2TP session (R/L 56927/4137)
Nov 2 08:38:38 pppd_L2TP0
L2TP tunnel/session created
Nov 2 08:38:38 pppd_L2TP0
PPP channel connected
Nov 2 08:38:38 pppd_L2TP0
using channel 22
Nov 2 08:38:38 pppd_L2TP0
Using interface ppp0
Nov 2 08:38:38 pppd_L2TP0
Connect: ppp0 <--> l2tp[0]
Nov 2 08:39:08 pppd_L2TP0
LCP: timeout sending Config-Requests
Nov 2 08:39:08 pppd_L2TP0
Connection terminated.
Nov 2 08:39:08 pppd_L2TP0 write: Bad file descriptor (9)
Nov 2 08:39:08 pppd_L2TP0
Modem hangup
Nov 2 08:39:08 pppd_L2TP0 write: Bad file descriptor (9)
Nov 2 08:39:08 pppd_L2TP0
Exit.
Nov 2 08:39:08 ndm
Service: "L2TP0": unexpectedly stopped.