基于WiFi的pptp不起作用

Question

我正在运行Ubuntu14.04，我试图在我和服务器之间建立一个pptp VPN。为此，我使用了network-manager。

现在，当我使用以太网时，虚拟专用网工作得很好，而在WiFi上，我的笔记本电脑不知道如何到达服务器(尽管ping作为外挂设备运行)：

15:50:35  NetworkManager[16692]: <info> Starting VPN service 'pptp'...
15:50:35  NetworkManager[16692]: <info> VPN service 'pptp' started (org.freedesktop.NetworkManager.pptp), PID 28057
15:50:35  NetworkManager[16692]: <info> VPN service 'pptp' appeared; activating connections
15:50:35  NetworkManager[16692]: <info> VPN plugin state changed: starting (3)
15:50:40  NetworkManager[16692]: <info> VPN connection 'pacage' (Connect) reply received.
15:50:40  pppd[28069]: Plugin /usr/lib/pppd/2.4.5/nm-pptp-pppd-plugin.so loaded.
15:50:40  pppd[28069]: pppd 2.4.5 started by root, uid 0
15:50:40  pppd[28069]: Using interface ppp0
15:50:40  pppd[28069]: Connect: ppp0 <--> /dev/pts/23
15:50:40  NetworkManager[16692]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
15:50:40  NetworkManager[16692]:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
15:50:40  NetworkManager[16692]: <warn> /sys/devices/virtual/net/ppp0: couldn't determine device driver; ignoring...
15:50:40  pptp[28073]: nm-pptp-service-28057 log[main:pptp.c:314]: The synchronous pptp option is NOT activated
15:50:40  pptp[28075]: nm-pptp-service-28057 warn[open_inetsock:pptp_callmgr.c:329]: connect: No route to host
15:50:40  pptp[28075]: nm-pptp-service-28057 fatal[callmgr_main:pptp_callmgr.c:127]: Could not open control connection to x.x.x.x
15:50:40  pptp[28073]: nm-pptp-service-28057 fatal[open_callmgr:pptp.c:487]: Call manager exited with error 256
15:50:40  pppd[28069]: Modem hangup
15:50:40  pppd[28069]: Connection terminated.
15:50:40  NetworkManager[16692]:    SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
15:50:40  NetworkManager[16692]: <warn> VPN plugin failed: 1
15:50:40  pppd[28069]: Exit.

我在这里错过了什么？

Answer 1

问题可能只是GRE数据包没有通过。

要解决此问题，请确保Wifi路由器或防火墙允许GRE协议47 (您将希望在您的路由器上找到并启用一个知道如何处理GRE数据包的"PPTP传递“功能)。实际上，端口1723和GRE协议都是开放/启用的，以便使用PPTP建立VPN连接。

希望它能解决问题。