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ubuntu vpn connection problem

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i'm usign ubuntu linux and want to connect to vpn server. the vpn testet by windows and it's ok. but when i add into vpn connection my connection will be failed and these messages will appear.

Oct 28 15:48:35 sweb-laptop pppd[12194]: Plugin /usr/lib/pppd/2.4.5//nm-pptp-pppd-plugin.so loaded. Oct 28 15:48:35 sweb-laptop pppd[12194]: pppd 2.4.5 started by root, uid 0 Oct 28 15:48:35 sweb-laptop pppd[12194]: Using interface ppp0 Oct 28 15:48:35 sweb-laptop pppd[12194]: Connect: ppp0 <--> /dev/pts/1 Oct 28 15:48:37 sweb-laptop kernel: [11695.582279] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=59 TOS=0x00 PREC=0x00 TTL=50 ID=55889 PROTO=47  Oct 28 15:48:37 sweb-laptop kernel: [11695.583231] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=50 TOS=0x00 PREC=0x00 TTL=50 ID=55890 PROTO=47  Oct 28 15:48:38 sweb-laptop kernel: [11696.700335] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=55891 PROTO=47  Oct 28 15:48:39 sweb-laptop kernel: [11697.967607] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=55892 PROTO=47  Oct 28 15:48:39 sweb-laptop kernel: [11698.285199] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=55893 PROTO=47  Oct 28 15:48:42 sweb-laptop kernel: [11700.720577] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=55894 PROTO=47  Oct 28 15:48:42 sweb-laptop kernel: [11700.976640] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=55895 PROTO=47  Oct 28 15:48:45 sweb-laptop kernel: [11703.977792] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=55896 PROTO=47  Oct 28 15:48:45 sweb-laptop kernel: [11704.220700] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=55897 PROTO=47  Oct 28 15:48:48 sweb-laptop kernel: [11706.974657] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=55898 PROTO=47  Oct 28 15:48:50 sweb-laptop kernel: [11709.005479] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=55899 PROTO=47  Oct 28 15:48:51 sweb-laptop kernel: [11709.988579] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=55900 PROTO=47  Oct 28 15:48:54 sweb-laptop kernel: [11712.977709] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=55901 PROTO=47  Oct 28 15:48:57 sweb-laptop kernel: [11715.984600] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=55902 PROTO=47  Oct 28 15:48:58 sweb-laptop kernel: [11716.676607] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=55903 PROTO=47  Oct 28 15:49:00 sweb-laptop kernel: [11718.984500] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=55904 PROTO=47  Oct 28 15:49:03 sweb-laptop kernel: [11721.983411] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=55905 PROTO=47  Oct 28 15:49:06 sweb-laptop pppd[12194]: LCP: timeout sending Config-Requests Oct 28 15:49:06 sweb-laptop pppd[12194]: Connection terminated. Oct 28 15:49:06 sweb-laptop pppd[12194]: Modem hangup Oct 28 15:49:06 sweb-laptop pppd[12194]: Exit. 

what's my problem. i'm using ubuntu 10.04. thank you.

more log:

Oct 28 17:49:37 sweb-laptop NetworkManager: <info>  Starting VPN service 'org.freedesktop.NetworkManager.pptp'... Oct 28 17:49:37 sweb-laptop NetworkManager: <info>  VPN service 'org.freedesktop.NetworkManager.pptp' started (org.freedesktop.NetworkManager.pptp), PID 2781 Oct 28 17:49:37 sweb-laptop NetworkManager: <info>  VPN service 'org.freedesktop.NetworkManager.pptp' just appeared, activating connections Oct 28 17:49:37 sweb-laptop NetworkManager: <info>  VPN plugin state changed: 1 Oct 28 17:49:37 sweb-laptop NetworkManager: <info>  VPN plugin state changed: 3 Oct 28 17:49:37 sweb-laptop NetworkManager: <info>  VPN connection 'MYVPN' (Connect) reply received. Oct 28 17:49:37 sweb-laptop pppd[2783]: Plugin /usr/lib/pppd/2.4.5//nm-pptp-pppd-plugin.so loaded. Oct 28 17:49:37 sweb-laptop pppd[2783]: pppd 2.4.5 started by root, uid 0 Oct 28 17:49:37 sweb-laptop NetworkManager:    SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0) Oct 28 17:49:37 sweb-laptop NetworkManager:    SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found. Oct 28 17:49:37 sweb-laptop pppd[2783]: Using interface ppp0 Oct 28 17:49:37 sweb-laptop pppd[2783]: Connect: ppp0 <--> /dev/pts/0 Oct 28 17:49:37 sweb-laptop pptp[2787]: nm-pptp-service-2781 log[main:pptp.c:314]: The synchronous pptp option is NOT activated Oct 28 17:49:37 sweb-laptop pptp[2794]: nm-pptp-service-2781 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request' Oct 28 17:49:37 sweb-laptop pptp[2794]: nm-pptp-service-2781 log[ctrlp_disp:pptp_ctrl.c:739]: Received Start Control Connection Reply Oct 28 17:49:37 sweb-laptop pptp[2794]: nm-pptp-service-2781 log[ctrlp_disp:pptp_ctrl.c:773]: Client connection established. Oct 28 17:49:38 sweb-laptop pptp[2794]: nm-pptp-service-2781 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request' Oct 28 17:49:38 sweb-laptop pptp[2794]: nm-pptp-service-2781 log[ctrlp_disp:pptp_ctrl.c:858]: Received Outgoing Call Reply. Oct 28 17:49:38 sweb-laptop pptp[2794]: nm-pptp-service-2781 log[ctrlp_disp:pptp_ctrl.c:897]: Outgoing call established (call ID 0, peer's call ID 32227). Oct 28 17:49:39 sweb-laptop kernel: [  384.539890] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=50 TOS=0x00 PREC=0x00 TTL=50 ID=970 PROTO=47  Oct 28 17:49:39 sweb-laptop kernel: [  384.541902] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=59 TOS=0x00 PREC=0x00 TTL=50 ID=969 PROTO=47  Oct 28 17:49:40 sweb-laptop kernel: [  385.476953] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=971 PROTO=47  Oct 28 17:49:41 sweb-laptop kernel: [  386.910951] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=972 PROTO=47  Oct 28 17:49:41 sweb-laptop kernel: [  386.939756] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=973 PROTO=47  Oct 28 17:49:43 sweb-laptop kernel: [  389.145950] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=974 PROTO=47  Oct 28 17:49:44 sweb-laptop kernel: [  389.923891] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=975 PROTO=47  Oct 28 17:49:47 sweb-laptop kernel: [  392.522791] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=976 PROTO=47  Oct 28 17:49:47 sweb-laptop kernel: [  392.924007] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=977 PROTO=47  Oct 28 17:49:50 sweb-laptop AptDaemon: INFO: Quiting due to inactivity Oct 28 17:49:50 sweb-laptop AptDaemon: INFO: Shutdown was requested Oct 28 17:49:50 sweb-laptop kernel: [  395.947167] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=978 PROTO=47  Oct 28 17:49:52 sweb-laptop kernel: [  398.061898] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=979 PROTO=47  Oct 28 17:49:53 sweb-laptop kernel: [  398.970317] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=980 PROTO=47  Oct 28 17:49:56 sweb-laptop kernel: [  401.934104] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=981 PROTO=47  Oct 28 17:49:59 sweb-laptop kernel: [  404.932978] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=982 PROTO=47  Oct 28 17:50:01 sweb-laptop kernel: [  406.527102] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=55 TOS=0x00 PREC=0x00 TTL=50 ID=983 PROTO=47  Oct 28 17:50:02 sweb-laptop kernel: [  407.935283] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=984 PROTO=47  Oct 28 17:50:05 sweb-laptop kernel: [  410.941308] Inbound IN=eth0 OUT= MAC=00:24:e8:d8:43:21:00:22:2d:3b:e5:1d:08:00 SRC=69.175.70.158 DST=192.168.2.3 LEN=54 TOS=0x00 PREC=0x00 TTL=50 ID=985 PROTO=47  Oct 28 17:50:08 sweb-laptop pppd[2783]: LCP: timeout sending Config-Requests Oct 28 17:50:08 sweb-laptop pppd[2783]: Connection terminated. Oct 28 17:50:08 sweb-laptop NetworkManager: <info>  VPN plugin failed: 1 Oct 28 17:50:08 sweb-laptop NetworkManager:    SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0) Oct 28 17:50:08 sweb-laptop pptp[2787]: nm-pptp-service-2781 warn[decaps_hdlc:pptp_gre.c:204]: short read (-1): Input/output error Oct 28 17:50:08 sweb-laptop pppd[2783]: Modem hangup Oct 28 17:50:08 sweb-laptop pptp[2787]: nm-pptp-service-2781 warn[decaps_hdlc:pptp_gre.c:216]: pppd may have shutdown, see pppd log Oct 28 17:50:08 sweb-laptop pptp[2794]: nm-pptp-service-2781 log[callmgr_main:pptp_callmgr.c:234]: Closing connection (unhandled) Oct 28 17:50:08 sweb-laptop pptp[2794]: nm-pptp-service-2781 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 12 'Call-Clear-Request' Oct 28 17:50:08 sweb-laptop pptp[2794]: nm-pptp-service-2781 log[call_callback:pptp_callmgr.c:79]: Closing connection (call state) Oct 28 17:50:08 sweb-laptop NetworkManager: <info>  VPN plugin failed: 1 Oct 28 17:50:08 sweb-laptop pppd[2783]: Exit. Oct 28 17:50:08 sweb-laptop NetworkManager: <info>  VPN plugin failed: 1 Oct 28 17:50:08 sweb-laptop NetworkManager: <info>  VPN plugin state changed: 6 Oct 28 17:50:08 sweb-laptop NetworkManager: <info>  VPN plugin state change reason: 0 Oct 28 17:50:08 sweb-laptop NetworkManager: <WARN>  connection_state_changed(): Could not process the request because no VPN connection was active. Oct 28 17:50:08 sweb-laptop NetworkManager: <info>  Policy set 'Home Network' (eth0) as default for routing and DNS. Oct 28 17:50:20 sweb-laptop NetworkManager: <debug> [1288275620.001374] ensure_killed(): waiting for vpn service pid 2781 to exit Oct 28 17:50:20 sweb-laptop NetworkManager: <debug> [1288275620.001553] ensure_killed(): vpn service pid 2781 cleaned up 

Answers

Absent your firewall config, I still strongly suspect that you're not accepting the GRE traffic which constitutes the VPN's encapsulation format. Try

iptables -I INPUT 1 -p 47 -s 69.175.70.158 -j ACCEPT

to accept GRE traffic from your VPN peer.

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