Падает VPN-соединение

В логе:
Jun 8 15:05:04 morgan-desktop pptp[7910]: nm-pptp-service-7897 log[ctrlp_disp:pptp_ctrl.c:929]: Call disconnect notification received (call id 49907)
Jun 8 15:05:04 morgan-desktop pptp[7910]: nm-pptp-service-7897 log[ctrlp_disp:pptp_ctrl.c:788]: Received Stop Control Connection Request.
Jun 8 15:05:04 morgan-desktop pptp[7910]: nm-pptp-service-7897 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 4 'Stop-Control-Connection-Reply'
Jun 8 15:05:04 morgan-desktop pptp[7910]: nm-pptp-service-7897 log[callmgr_main:pptp_callmgr.c:258]: Closing connection (shutdown)
Jun 8 15:05:04 morgan-desktop pptp[7910]: nm-pptp-service-7897 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 12 'Call-Clear-Request'
Jun 8 15:05:04 morgan-desktop pptp[7910]: nm-pptp-service-7897 log[call_callback:pptp_callmgr.c:79]: Closing connection (call state)
Jun 8 15:05:04 morgan-desktop pppd[7899]: Modem hangup