ubuntu pptp连接失败 附系统日志 在线等。。。。。。。。。。

包含网卡/无线网的网络问题和ADSL/校园网/宽带拨号支持及代理/共享等网络使用问题
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llz9178
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注册时间: 2013-01-06 15:33
系统: ubuntu

ubuntu pptp连接失败 附系统日志 在线等。。。。。。。。。。

#1

帖子 llz9178 » 2013-01-06 15:38

发帖前20分钟还是正常的,貌似从我没有断开VPN便重启开始就不能拨号成功了,

windows下和android下正常,VPN是我自己在VPS上搭的,相关日志如下:

代码: 全选

Jan  6 15:26:19 izeal-VGN-SR16-S NetworkManager[982]: <info> Starting VPN service 'pptp'...
Jan  6 15:26:19 izeal-VGN-SR16-S NetworkManager[982]: <info> VPN service 'pptp' started (org.freedesktop.NetworkManager.pptp), PID 13771
Jan  6 15:26:19 izeal-VGN-SR16-S NetworkManager[982]: <info> VPN service 'pptp' appeared; activating connections
Jan  6 15:26:19 izeal-VGN-SR16-S NetworkManager[982]: <info> VPN plugin state changed: starting (3)
Jan  6 15:26:19 izeal-VGN-SR16-S NetworkManager[982]: <info> VPN connection 'VPN 连接 1' (Connect) reply received.
Jan  6 15:26:19 izeal-VGN-SR16-S pppd[13775]: Plugin /usr/lib/pppd/2.4.5/nm-pptp-pppd-plugin.so loaded.
Jan  6 15:26:19 izeal-VGN-SR16-S pppd[13775]: pppd 2.4.5 started by root, uid 0
Jan  6 15:26:19 izeal-VGN-SR16-S pppd[13775]: Using interface ppp0
Jan  6 15:26:19 izeal-VGN-SR16-S pppd[13775]: Connect: ppp0 <--> /dev/pts/0
Jan  6 15:26:19 izeal-VGN-SR16-S pptp[13778]: nm-pptp-service-13771 log[main:pptp.c:314]: The synchronous pptp option is NOT activated
Jan  6 15:26:19 izeal-VGN-SR16-S NetworkManager[982]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Jan  6 15:26:19 izeal-VGN-SR16-S NetworkManager[982]:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
Jan  6 15:26:19 izeal-VGN-SR16-S NetworkManager[982]: <warn> /sys/devices/virtual/net/ppp0: couldn't determine device driver; ignoring...
Jan  6 15:26:19 izeal-VGN-SR16-S pptp[13786]: nm-pptp-service-13771 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request'
Jan  6 15:26:19 izeal-VGN-SR16-S pptp[13786]: nm-pptp-service-13771 log[ctrlp_disp:pptp_ctrl.c:739]: Received Start Control Connection Reply
Jan  6 15:26:19 izeal-VGN-SR16-S pptp[13786]: nm-pptp-service-13771 log[ctrlp_disp:pptp_ctrl.c:773]: Client connection established.
Jan  6 15:26:20 izeal-VGN-SR16-S pptp[13786]: nm-pptp-service-13771 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request'
Jan  6 15:26:20 izeal-VGN-SR16-S pptp[13786]: nm-pptp-service-13771 log[ctrlp_disp:pptp_ctrl.c:858]: Received Outgoing Call Reply.
Jan  6 15:26:20 izeal-VGN-SR16-S pptp[13786]: nm-pptp-service-13771 log[ctrlp_disp:pptp_ctrl.c:897]: Outgoing call established (call ID 0, peer's call ID 13056).
Jan  6 15:26:50 izeal-VGN-SR16-S pppd[13775]: LCP: timeout sending Config-Requests
Jan  6 15:26:50 izeal-VGN-SR16-S pppd[13775]: Connection terminated.
Jan  6 15:26:50 izeal-VGN-SR16-S NetworkManager[982]: <warn> VPN plugin failed: 1
Jan  6 15:26:50 izeal-VGN-SR16-S avahi-daemon[600]: Withdrawing workstation service for ppp0.
Jan  6 15:26:50 izeal-VGN-SR16-S NetworkManager[982]:    SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Jan  6 15:26:50 izeal-VGN-SR16-S pptp[13778]: nm-pptp-service-13771 warn[decaps_hdlc:pptp_gre.c:204]: short read (-1): Input/output error
Jan  6 15:26:50 izeal-VGN-SR16-S pptp[13778]: nm-pptp-service-13771 warn[decaps_hdlc:pptp_gre.c:216]: pppd may have shutdown, see pppd log
Jan  6 15:26:50 izeal-VGN-SR16-S pptp[13786]: nm-pptp-service-13771 log[callmgr_main:pptp_callmgr.c:234]: Closing connection (unhandled)
Jan  6 15:26:50 izeal-VGN-SR16-S pptp[13786]: nm-pptp-service-13771 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 12 'Call-Clear-Request'
Jan  6 15:26:50 izeal-VGN-SR16-S pptp[13786]: nm-pptp-service-13771 log[call_callback:pptp_callmgr.c:79]: Closing connection (call state)
Jan  6 15:26:50 izeal-VGN-SR16-S NetworkManager[982]: <warn> VPN plugin failed: 1
Jan  6 15:26:50 izeal-VGN-SR16-S pppd[13775]: Modem hangup
Jan  6 15:26:50 izeal-VGN-SR16-S pppd[13775]: Exit.
Jan  6 15:26:50 izeal-VGN-SR16-S NetworkManager[982]: <warn> VPN plugin failed: 1
Jan  6 15:26:50 izeal-VGN-SR16-S NetworkManager[982]: <info> VPN plugin state changed: stopped (6)
Jan  6 15:26:50 izeal-VGN-SR16-S NetworkManager[982]: <info> VPN plugin state change reason: 0
Jan  6 15:26:50 izeal-VGN-SR16-S NetworkManager[982]: <info> Policy set 'GYKX' (eth0) as default for IPv4 routing and DNS.
Jan  6 15:26:50 izeal-VGN-SR16-S NetworkManager[982]: <warn> error disconnecting VPN: Could not process the request because no VPN connection was active.
请问这个是什么问题呢?怎么解决?我已经重装了pptp,还是不行。。。
wzhy90
帖子: 91
注册时间: 2012-08-14 21:25

Re: ubuntu pptp连接失败 附系统日志 在线等。。。。。。。。。。

#2

帖子 wzhy90 » 2013-01-28 21:36

http://packages.linuxdeepin.com/debian/ ... 1_i386.deb
下载这个包重新安装,然后还是不行试试vpn的dns设置为8.8.8.8
邮箱:wzhy90@qq.com
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jiyinyiyong
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Re: ubuntu pptp连接失败 附系统日志 在线等。。。。。。。。。。

#3

帖子 jiyinyiyong » 2013-04-17 22:45

类似问题,,, 也没有解决~,, 不知道还有指点的方案么? Ubuntu 12.10

代码: 全选

Apr 17 22:44:21 zjut-ubuntu pppd[26375]: LCP: timeout sending Config-Requests
Apr 17 22:44:21 zjut-ubuntu pppd[26375]: Connection terminated.
Apr 17 22:44:21 zjut-ubuntu avahi-daemon[919]: Withdrawing workstation service for ppp0.
Apr 17 22:44:21 zjut-ubuntu NetworkManager[942]: <warn> VPN plugin failed: 1
Apr 17 22:44:21 zjut-ubuntu NetworkManager[942]:    SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Apr 17 22:44:21 zjut-ubuntu pptp[26378]: nm-pptp-service-26371 warn[decaps_hdlc:pptp_gre.c:204]: short read (-1): Input/output error
Apr 17 22:44:21 zjut-ubuntu pptp[26378]: nm-pptp-service-26371 warn[decaps_hdlc:pptp_gre.c:216]: pppd may have shutdown, see pppd log
Apr 17 22:44:21 zjut-ubuntu pppd[26375]: Modem hangup
Apr 17 22:44:21 zjut-ubuntu pptp[26390]: nm-pptp-service-26371 log[callmgr_main:pptp_callmgr.c:234]: Closing connection (unhandled)
Apr 17 22:44:21 zjut-ubuntu pptp[26390]: nm-pptp-service-26371 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 12 'Call-Clear-Request'
Apr 17 22:44:21 zjut-ubuntu pptp[26390]: nm-pptp-service-26371 log[call_callback:pptp_callmgr.c:79]: Closing connection (call state)
Apr 17 22:44:21 zjut-ubuntu pppd[26375]: Exit.
Apr 17 22:44:21 zjut-ubuntu NetworkManager[942]: <warn> VPN plugin failed: 1
Apr 17 22:44:21 zjut-ubuntu NetworkManager[942]: <warn> VPN plugin failed: 1
Apr 17 22:44:21 zjut-ubuntu NetworkManager[942]: <info> VPN plugin state changed: stopped (6)
Apr 17 22:44:21 zjut-ubuntu NetworkManager[942]: <info> VPN plugin state change reason: 0
Apr 17 22:44:21 zjut-ubuntu NetworkManager[942]: <warn> error disconnecting VPN: Could not process the request because no VPN connection was active.
Apr 17 22:44:21 zjut-ubuntu NetworkManager[942]: <info> Policy set 'yx' (eth2) as default for IPv4 routing and DNS.
Apr 17 22:44:26 zjut-ubuntu NetworkManager[942]: <info> VPN service 'pptp' disappeared
Apr 17 22:45:01 zjut-ubuntu CRON[27588]: (root) CMD (command -v debian-sa1 > /dev/null && debian-sa1 1 1)

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jiyinyiyong
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Re: ubuntu pptp连接失败 附系统日志 在线等。。。。。。。。。。

#4

帖子 jiyinyiyong » 2013-04-19 9:40

继续还是失败, 网上找了几个类似的, 没有成功
环境是办公室 WiFi, 在用网卡 wlan0

代码: 全选


Apr 19 09:35:16 ubuntu64 NetworkManager[858]: <info> Starting VPN service 'pptp'...
Apr 19 09:35:16 ubuntu64 NetworkManager[858]: <info> VPN service 'pptp' started (org.freedesktop.NetworkManager.pptp), PID 17369
Apr 19 09:35:16 ubuntu64 NetworkManager[858]: <info> VPN service 'pptp' appeared; activating connections
Apr 19 09:35:20 ubuntu64 NetworkManager[858]: <info> VPN plugin state changed: starting (3)
Apr 19 09:35:20 ubuntu64 NetworkManager[858]: <info> VPN connection 'ha.zhxi.com' (Connect) reply received.
Apr 19 09:35:20 ubuntu64 pppd[17373]: Plugin /usr/lib/pppd/2.4.5/nm-pptp-pppd-plugin.so loaded.
Apr 19 09:35:20 ubuntu64 pppd[17373]: pppd 2.4.5 started by root, uid 0
Apr 19 09:35:20 ubuntu64 pppd[17373]: Using interface ppp0
Apr 19 09:35:20 ubuntu64 pppd[17373]: Connect: ppp0 <--> /dev/pts/7
Apr 19 09:35:20 ubuntu64 pptp[17376]: nm-pptp-service-17369 log[main:pptp.c:314]: The synchronous pptp option is NOT activated
Apr 19 09:35:20 ubuntu64 NetworkManager[858]:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Apr 19 09:35:20 ubuntu64 NetworkManager[858]:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
Apr 19 09:35:20 ubuntu64 NetworkManager[858]: <warn> /sys/devices/virtual/net/ppp0: couldn't determine device driver; ignoring...
Apr 19 09:35:21 ubuntu64 pptp[17384]: nm-pptp-service-17369 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request'
Apr 19 09:35:21 ubuntu64 pptp[17384]: nm-pptp-service-17369 log[ctrlp_disp:pptp_ctrl.c:739]: Received Start Control Connection Reply
Apr 19 09:35:21 ubuntu64 pptp[17384]: nm-pptp-service-17369 log[ctrlp_disp:pptp_ctrl.c:773]: Client connection established.
Apr 19 09:35:22 ubuntu64 pptp[17384]: nm-pptp-service-17369 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request'
Apr 19 09:35:51 ubuntu64 pppd[17373]: LCP: timeout sending Config-Requests
Apr 19 09:35:51 ubuntu64 pppd[17373]: Connection terminated.
Apr 19 09:35:51 ubuntu64 NetworkManager[858]: <warn> VPN plugin failed: 1
Apr 19 09:35:51 ubuntu64 NetworkManager[858]:    SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Apr 19 09:35:51 ubuntu64 pppd[17373]: Modem hangup
Apr 19 09:35:51 ubuntu64 NetworkManager[858]: <warn> VPN plugin failed: 1
Apr 19 09:35:52 ubuntu64 kernel: [92114.009049] audit_printk_skb: 24 callbacks suppressed
Apr 19 09:35:52 ubuntu64 kernel: [92114.009052] type=1701 audit(1366335352.985:6255): auid=4294967295 uid=1001 gid=1001 ses=4294967295 pid=17226 comm="chrome" reason="seccomp" sig=0 syscall=2 compat=0 ip=0x7f30a9b0d6b0 code=0x50000
Apr 19 09:35:52 ubuntu64 kernel: [92114.009061] type=1701 audit(1366335352.985:6256): auid=4294967295 uid=1001 gid=1001 ses=4294967295 pid=17226 comm="chrome" reason="seccomp" sig=0 syscall=2 compat=0 ip=0x7f30a9b0d6b0 code=0x50000
Apr 19 09:35:56 ubuntu64 pppd[17373]: Child process /usr/sbin/pptp 204.74.212.211 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-17369 (pid 17375) terminated with signal 15
Apr 19 09:35:56 ubuntu64 pppd[17373]: Exit.
Apr 19 09:35:56 ubuntu64 NetworkManager[858]: <warn> VPN plugin failed: 1
Apr 19 09:35:56 ubuntu64 NetworkManager[858]: <info> VPN plugin state changed: stopped (6)
Apr 19 09:35:56 ubuntu64 NetworkManager[858]: <info> VPN plugin state change reason: 0
Apr 19 09:35:56 ubuntu64 NetworkManager[858]: <info> Policy set 'DT' (wlan0) as default for IPv4 routing and DNS.
Apr 19 09:35:56 ubuntu64 NetworkManager[858]: <warn> error disconnecting VPN: Could not process the request because no VPN connection was active.
Apr 19 09:36:01 ubuntu64 NetworkManager[858]: <info> VPN service 'pptp' disappeared
Apr 19 09:36:22 ubuntu64 pptp[17384]: nm-pptp-service-17369 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 12 'Call-Clear-Request'
Apr 19 09:36:22 ubuntu64 pptp[17384]: nm-pptp-service-17369 log[pptp_read_some:pptp_ctrl.c:551]: read error: Connection reset by peer
Apr 19 09:36:22 ubuntu64 pptp[17384]: nm-pptp-service-17369 log[callmgr_main:pptp_callmgr.c:258]: Closing connection (shutdown)
Apr 19 09:36:22 ubuntu64 pptp[17384]: nm-pptp-service-17369 log[pptp_send_ctrl_packet:pptp_ctrl.c:622]: write error: Broken pipe
Apr 19 09:36:22 ubuntu64 pptp[17384]: nm-pptp-service-17369 log[call_callback:pptp_callmgr.c:79]: Closing connection (call state)
Apr 19 09:36:22 ubuntu64 kernel: [92143.212191] pptpcm[17384]: segfault at 7fffcad2a560 ip 0000000000405a32 sp 00007fffca8dccb0 error 4 in pptp[400000+10000]
musikee
帖子: 1
注册时间: 2013-04-21 17:16
系统: ubuntu 12.10

Re: ubuntu pptp连接失败 附系统日志 在线等。。。。。。。。。。

#5

帖子 musikee » 2013-04-21 17:24

我也遇到了这个问题
系统 12.10
network-manager-pptp.0.9.6
==========================
Apr 21 17:20:37 fork4 NetworkManager[1041]: <info> Starting VPN service 'pptp'...
Apr 21 17:20:37 fork4 NetworkManager[1041]: <info> VPN service 'pptp' started (org.freedesktop.NetworkManager.pptp), PID 4283
Apr 21 17:20:38 fork4 NetworkManager[1041]: <info> VPN service 'pptp' appeared; activating connections
Apr 21 17:20:38 fork4 NetworkManager[1041]: <info> VPN plugin state changed: starting (3)
Apr 21 17:20:38 fork4 NetworkManager[1041]: <info> VPN connection 'VPNCloud.me (PPTP)' (Connect) reply received.
Apr 21 17:20:38 fork4 pppd[4287]: Plugin /usr/lib/pppd/2.4.5/nm-pptp-pppd-plugin.so loaded.
Apr 21 17:20:38 fork4 pppd[4287]: pppd 2.4.5 started by root, uid 0
Apr 21 17:20:38 fork4 pppd[4287]: using channel 2
Apr 21 17:20:38 fork4 pppd[4287]: Using interface ppp0
Apr 21 17:20:38 fork4 pppd[4287]: Connect: ppp0 <--> /dev/pts/2
Apr 21 17:20:38 fork4 pptp[4290]: nm-pptp-service-4283 log[main:pptp.c:314]: The synchronous pptp option is NOT activated
Apr 21 17:20:38 fork4 NetworkManager[1041]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Apr 21 17:20:38 fork4 NetworkManager[1041]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
Apr 21 17:20:38 fork4 NetworkManager[1041]: <warn> /sys/devices/virtual/net/ppp0: couldn't determine device driver; ignoring...
Apr 21 17:20:38 fork4 pptp[4304]: nm-pptp-service-4283 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request'
Apr 21 17:20:38 fork4 pptp[4304]: nm-pptp-service-4283 log[ctrlp_disp:pptp_ctrl.c:739]: Received Start Control Connection Reply
Apr 21 17:20:38 fork4 pptp[4304]: nm-pptp-service-4283 log[ctrlp_disp:pptp_ctrl.c:773]: Client connection established.
Apr 21 17:20:39 fork4 pppd[4287]: sent [LCP ConfReq id=0x1 <asyncmap 0x0> <magic 0x1541b7ea> <pcomp> <accomp>]
Apr 21 17:20:39 fork4 pptp[4304]: nm-pptp-service-4283 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request'
Apr 21 17:20:39 fork4 pptp[4304]: nm-pptp-service-4283 log[ctrlp_disp:pptp_ctrl.c:858]: Received Outgoing Call Reply.
Apr 21 17:20:39 fork4 pptp[4304]: nm-pptp-service-4283 log[ctrlp_disp:pptp_ctrl.c:897]: Outgoing call established (call ID 0, peer's call ID 65280).
Apr 21 17:20:39 fork4 pppd[4287]: rcvd [LCP ConfReq id=0x1 <asyncmap 0x0> <auth chap MS-v2> <magic 0xc753938> <pcomp> <accomp>]
Apr 21 17:20:39 fork4 pppd[4287]: sent [LCP ConfNak id=0x1 <auth pap>]
Apr 21 17:20:39 fork4 pppd[4287]: rcvd [LCP ConfAck id=0x1 <asyncmap 0x0> <magic 0x1541b7ea> <pcomp> <accomp>]
Apr 21 17:20:39 fork4 pppd[4287]: rcvd [LCP ConfReq id=0x2 <asyncmap 0x0> <magic 0xc753938> <pcomp> <accomp>]
Apr 21 17:20:39 fork4 pppd[4287]: sent [LCP ConfAck id=0x2 <asyncmap 0x0> <magic 0xc753938> <pcomp> <accomp>]
Apr 21 17:20:39 fork4 pppd[4287]: sent [IPCP ConfReq id=0x1 <addr 0.0.0.0> <ms-dns1 0.0.0.0> <ms-dns2 0.0.0.0>]
Apr 21 17:20:40 fork4 pppd[4287]: rcvd [LCP EchoReq id=0x0 magic=0xc753938]
Apr 21 17:20:40 fork4 pppd[4287]: sent [LCP EchoRep id=0x0 magic=0x1541b7ea]
Apr 21 17:20:40 fork4 pppd[4287]: rcvd [LCP TermReq id=0x3 "peer refused to authenticate"]
Apr 21 17:20:40 fork4 pppd[4287]: LCP terminated by peer (peer refused to authenticate)
Apr 21 17:20:40 fork4 pppd[4287]: sent [LCP TermAck id=0x3]
Apr 21 17:20:40 fork4 pptp[4304]: nm-pptp-service-4283 log[pptp_read_some:pptp_ctrl.c:544]: read returned zero, peer has closed
Apr 21 17:20:40 fork4 pptp[4304]: nm-pptp-service-4283 log[callmgr_main:pptp_callmgr.c:258]: Closing connection (shutdown)
Apr 21 17:20:40 fork4 pptp[4304]: nm-pptp-service-4283 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 12 'Call-Clear-Request'
Apr 21 17:20:40 fork4 pptp[4304]: nm-pptp-service-4283 log[pptp_read_some:pptp_ctrl.c:544]: read returned zero, peer has closed
Apr 21 17:20:40 fork4 pptp[4304]: nm-pptp-service-4283 log[call_callback:pptp_callmgr.c:79]: Closing connection (call state)
Apr 21 17:20:40 fork4 pppd[4287]: Modem hangup
Apr 21 17:20:40 fork4 pppd[4287]: Connection terminated.
Apr 21 17:20:40 fork4 avahi-daemon[667]: Withdrawing workstation service for ppp0.
Apr 21 17:20:40 fork4 NetworkManager[1041]: <warn> VPN plugin failed: 1
Apr 21 17:20:40 fork4 NetworkManager[1041]: SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Apr 21 17:20:40 fork4 pppd[4287]: Script /usr/sbin/pptp 66.175.219.136 --nolaunchpppd --loglevel 0 --logstring nm-pptp-service-4283 finished (pid 4289), status = 0x0
Apr 21 17:20:40 fork4 pppd[4287]: Exit.
Apr 21 17:20:40 fork4 NetworkManager[1041]: <warn> VPN plugin failed: 1
Apr 21 17:20:40 fork4 NetworkManager[1041]: <warn> VPN plugin failed: 1
Apr 21 17:20:40 fork4 NetworkManager[1041]: <info> VPN plugin state changed: stopped (6)
Apr 21 17:20:40 fork4 NetworkManager[1041]: <info> VPN plugin state change reason: 0
====================

是否9.10后自动refuse-eda?
plz help us
verbenapink
帖子: 1
注册时间: 2018-01-09 9:13
系统: ubuntu

Re: ubuntu pptp连接失败 附系统日志 在线等。。。。。。。。。。

#6

帖子 verbenapink » 2018-01-09 9:16

网搜,LCP: timeout sending Config-Requests
有时是因为没有绑定gre协议。绑定后我的这个问题好了,但是我还有另一个问题。
试一下吧:
iptables -A INPUT -p gre -j ACCEPT
iptables -A OUTPUT -p gre -j ACCEPT
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