我的也是哦，刚借苹果机测试了一下pptp 立马就连上了，但是deepin 只显示一个“断开”。。。好无语啊，https://bbs.deepin.org/user/101846

连接 vpn 之前, 执行下 sudo journalctl -u NetworkManager -f 然后去连接vpn, 失败后把输出上传下

帮忙看一下是什么问题，谢谢！
11月 07 21:57:19 hutao-PC pppd[9979]: Terminating on signal 15
11月 07 21:57:19 hutao-PC NetworkManager[2756]: Terminating on signal 15
11月 07 21:57:19 hutao-PC NetworkManager[2756]: Child process /usr/sbin/pptp 211.131.93.4 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-9960 (pid 10004) terminated with signal 15
11月 07 21:57:19 hutao-PC NetworkManager[2756]: Modem hangup
11月 07 21:57:19 hutao-PC pppd[9979]: Child process /usr/sbin/pptp 211.131.93.4 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-9960 (pid 10004) terminated with signal 15
11月 07 21:57:19 hutao-PC pppd[9979]: Modem hangup
11月 07 21:57:19 hutao-PC pppd[9979]: Exit.
11月 07 21:58:58 hutao-PC NetworkManager[2756]: nm-pptp-service-9960 warn[open_inetsock:pptp_callmgr.c:352]: connect: Connection timed out
11月 07 21:58:58 hutao-PC NetworkManager[2756]: nm-pptp-service-9960 fatal[callmgr_main:pptp_callmgr.c:134]: Could not open control connection to 211.131.93.4
11月 07 21:58:58 hutao-PC NetworkManager[2756]: nm-pptp-service-9960 fatal[open_callmgr:pptp.c:525]: Call manager exited with error 256
11月 07 22:22:49 hutao-PC NetworkManager[2756]:   [1541600569.3728] audit: op="connection-activate" uuid="ab47fbff-9702-4150-8779-8494e0c0614d" name="emis" pid=4967 uid=1000 result="success"
11月 07 22:22:49 hutao-PC NetworkManager[2756]:   [1541600569.3773] vpn-connection[0x55630f3c2210,ab47fbff-9702-4150-8779-8494e0c0614d,"emis",0]: Started the VPN service, PID 24436
11月 07 22:22:49 hutao-PC NetworkManager[2756]:   [1541600569.4134] vpn-connection[0x55630f3c2210,ab47fbff-9702-4150-8779-8494e0c0614d,"emis",0]: Saw the service appear; activating connection
11月 07 22:22:49 hutao-PC NetworkManager[2756]:   [1541600569.4445] vpn-connection[0x55630f3c2210,ab47fbff-9702-4150-8779-8494e0c0614d,"emis",0]: VPN plugin: state changed: starting (3)
11月 07 22:22:49 hutao-PC pppd[24440]: Plugin /usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
11月 07 22:22:49 hutao-PC NetworkManager[2756]: Plugin /usr/lib/pppd/2.4.7/nm-pptp-pppd-plugin.so loaded.
11月 07 22:22:49 hutao-PC pppd[24440]: pppd 2.4.7 started by root, uid 0
11月 07 22:22:49 hutao-PC pppd[24440]: Using interface ppp0
11月 07 22:22:49 hutao-PC NetworkManager[2756]: Using interface ppp0
11月 07 22:22:49 hutao-PC NetworkManager[2756]: Connect: ppp0 <--> /dev/pts/1
11月 07 22:22:49 hutao-PC pppd[24440]: Connect: ppp0 <--> /dev/pts/1
11月 07 22:22:49 hutao-PC NetworkManager[2756]:   [1541600569.4538] manager: (ppp0): new Ppp device (/org/freedesktop/NetworkManager/Devices/20)
11月 07 22:22:49 hutao-PC pptp[24447]: nm-pptp-service-24436 log[main:pptp.c:353]: The synchronous pptp option is NOT activated
11月 07 22:22:49 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 1 'Start-Control-Connection-Request'
11月 07 22:22:49 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_disp:pptp_ctrl.c:781]: Received Start Control Connection Reply
11月 07 22:22:49 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_disp:pptp_ctrl.c:815]: Client connection established.
11月 07 22:22:49 hutao-PC NetworkManager[2756]:   [1541600569.4969] devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
11月 07 22:22:49 hutao-PC NetworkManager[2756]:   [1541600569.4969] device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 7 'Outgoing-Call-Request'
11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_disp:pptp_ctrl.c:900]: Received Outgoing Call Reply.
11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_disp:pptp_ctrl.c:939]: Outgoing call established (call ID 60591, peer's call ID 8736).
11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_disp:pptp_ctrl.c:1005]: PPTP_SET_LINK_INFO received from peer_callid 50738
11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_disp:pptp_ctrl.c:1008]:   send_accm is 00000000, recv_accm is FFFFFFFF
11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 warn[ctrlp_disp:pptp_ctrl.c:1011]: Non-zero Async Control Character Maps are not supported!
11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_disp:pptp_ctrl.c:1005]: PPTP_SET_LINK_INFO received from peer_callid 50738
11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_disp:pptp_ctrl.c:1008]:   send_accm is FFFFFFFF, recv_accm is FFFFFFFF
11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 warn[ctrlp_disp:pptp_ctrl.c:1011]: Non-zero Async Control Character Maps are not supported!
11月 07 22:22:50 hutao-PC pppd[24440]: LCP terminated by peer (3^V^AM-~^@ 11月 07 22:22:50 hutao-PC NetworkManager[2756]: LCP terminated by peer (3^V^AM-~^@ 11月 07 22:22:50 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_disp:pptp_ctrl.c:955]: Received Call Clear Request.
11月 07 22:22:53 hutao-PC pppd[24440]: Connection terminated.
11月 07 22:22:53 hutao-PC NetworkManager[2756]: Connection terminated.
11月 07 22:22:53 hutao-PC NetworkManager[2756]:   [1541600573.5066] vpn-connection[0x55630f3c2210,ab47fbff-9702-4150-8779-8494e0c0614d,"emis",0]: VPN plugin: failed: connect-failed (1)
11月 07 22:22:53 hutao-PC NetworkManager[2756]:   [1541600573.5082] vpn-connection[0x55630f3c2210,ab47fbff-9702-4150-8779-8494e0c0614d,"emis",0]: VPN plugin: state changed: stopping (5)
11月 07 22:22:53 hutao-PC NetworkManager[2756]:   [1541600573.5085] devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
11月 07 22:22:53 hutao-PC NetworkManager[2756]:   [1541600573.5090] vpn-connection[0x55630f3c2210,ab47fbff-9702-4150-8779-8494e0c0614d,"emis",0]: VPN plugin: state changed: stopped (6)
11月 07 22:22:53 hutao-PC NetworkManager[2756]:   [1541600573.5122] vpn-connection[0x55630f3c2210,ab47fbff-9702-4150-8779-8494e0c0614d,"emis",0]: VPN service disappeared
11月 07 22:22:53 hutao-PC pppd[24440]: Terminating on signal 15
11月 07 22:22:53 hutao-PC NetworkManager[2756]: Terminating on signal 15
11月 07 22:22:53 hutao-PC pptp[24447]: nm-pptp-service-24436 warn[decaps_hdlc:pptp_gre.c:226]: short read (-1): Input/output error
11月 07 22:22:53 hutao-PC pptp[24447]: nm-pptp-service-24436 warn[decaps_hdlc:pptp_gre.c:238]: pppd may have shutdown, see pppd log
11月 07 22:22:53 hutao-PC NetworkManager[2756]: Child process /usr/sbin/pptp 211.141.93.4 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-24436 (pid 24443) terminated with signal 15
11月 07 22:22:53 hutao-PC NetworkManager[2756]: Modem hangup
11月 07 22:22:53 hutao-PC pppd[24440]: Child process /usr/sbin/pptp 211.141.93.4 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-24436 (pid 24443) terminated with signal 15
11月 07 22:22:53 hutao-PC pppd[24440]: Modem hangup
11月 07 22:22:53 hutao-PC pppd[24440]: Exit.
11月 07 22:22:53 hutao-PC pptp[24456]: nm-pptp-service-24436 log[callmgr_main:pptp_callmgr.c:245]: Closing connection (unhandled)
11月 07 22:22:53 hutao-PC pptp[24456]: nm-pptp-service-24436 log[ctrlp_rep:pptp_ctrl.c:259]: Sent control packet type is 12 'Call-Clear-Request'
11月 07 22:22:53 hutao-PC pptp[24456]: nm-pptp-service-24436 log[call_callback:pptp_callmgr.c:84]: Closing connection (call state)

你可以试一下打开vpn设置里面的 "使用带状态的MPPE" 选项

本帖最后由 fredzhang 于 2018-11-8 11:37 编辑

可以看看我的贴子是否可以帮到你。

https://bbs.deepin.org/post/170621#
https://www.jianshu.com/p/b1bcb04d17ff

开了还是不行。

系统提示:
Could not bind network socket to local port 500
Only one process may bind to the source port at any one time.

不知道您是怎么设置的，这个提示说明要使用的端口被占用了，您换一个端口进行连接或者把占用500端口的服务关掉

己解决拔VPN提示失败的问题。
解决方法是：
将下面字段添加到/etc/ppp/options文件中(root用户权限可更改）
refuse-pap
refuse-eap
refuse-chap
refuse-mschap
require-mppe

这些在控制中心里也有啊
PS: 连 VPN 之前最好向公司的网络管理员问清 VPN 的详细配置