ubuntu 配置vpn错误

Question

错误日志
Sep 21 10:16:23 hehongwei-ThinkPad-T410 NetworkManager[815]: VPN service 'pptp' disappeared
Sep 21 10:17:01 hehongwei-ThinkPad-T410 CRON[4142]: (root) CMD ( cd / && run-parts --report /etc/cron.hourly)
Sep 21 10:18:00 hehongwei-ThinkPad-T410 wpa_supplicant[1009]: wlan0: CTRL-EVENT-SCAN-STARTED
Sep 21 10:18:06 hehongwei-ThinkPad-T410 wpa_supplicant[1009]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Sep 21 10:20:00 hehongwei-ThinkPad-T410 wpa_supplicant[1009]: wlan0: CTRL-EVENT-SCAN-STARTED
Sep 21 10:20:06 hehongwei-ThinkPad-T410 wpa_supplicant[1009]: nl80211: send_and_recv->nl_recvmsgs failed: -33
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: Starting VPN service 'pptp'...
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: VPN service 'pptp' started (org.freedesktop.NetworkManager.pptp), PID 4207
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: VPN service 'pptp' appeared; activating connections
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: VPN plugin state changed: starting (3)
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: VPN connection 'VPN 连接' (Connect) reply received.
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: VPN connection 'VPN 连接' failed to connect: '无效的网关“gateway”'.
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: Policy set 'btchina' (wlan0) as default for IPv4 routing and DNS.
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: error disconnecting VPN: Could not process the request because no VPN connection was active.

ubuntu菜鸟，大神请指点

Answer 1

Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: VPN connection 'VPN 连接' failed to connect: '无效的网关“gateway”'.
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: Policy set 'btchina' (wlan0) as default for IPv4 routing and DNS.
Sep 21 10:21:17 hehongwei-ThinkPad-T410 NetworkManager[815]: error disconnecting VPN: Could not process the request because no VPN connection was active.

Ia masih menjadi masalah konfigurasi, semak fail konfigurasi dengan teliti. Saya tidak pernah bermain dengan pptp, saya telah mencuba openvpn sebelum ini.