PPTP VPN - I'm Lost!

[blunderbus]

I'm new to Linux/Mint and am trying to get PPTP VPN to connect to my work (Windows Domain). I have read various posts/articles to get this working but am non-the-wiser really and would be grateful for any assistance to troubleshoot and, perhaps, to start over and do it correctly.

I installed OpenVPN but get 'connection failed'. I hope that the following output will provide some clues...

Jul 25 23:17:09 XPS-M1530 NetworkManager[867]: <info> Starting VPN service 'pptp'...
Jul 25 23:17:09 XPS-M1530 NetworkManager[867]: <info> VPN service 'pptp' started (org.freedesktop.NetworkManager.pptp), PID 3820
Jul 25 23:17:09 XPS-M1530 NetworkManager[867]: <info> VPN service 'pptp' appeared; activating connections
Jul 25 23:17:09 XPS-M1530 NetworkManager[867]: <info> VPN plugin state changed: starting (3)
Jul 25 23:17:09 XPS-M1530 NetworkManager[867]: <info> VPN connection 'VPN connection 1' (Connect) reply received.
Jul 25 23:17:09 XPS-M1530 pppd[3823]: Plugin /usr/lib/pppd/2.4.5/nm-pptp-pppd-plugin.so loaded.
Jul 25 23:17:09 XPS-M1530 pppd[3823]: pppd 2.4.5 started by root, uid 0
Jul 25 23:17:09 XPS-M1530 NetworkManager[867]: SCPlugin-Ifupdown: devices added (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Jul 25 23:17:09 XPS-M1530 NetworkManager[867]: SCPlugin-Ifupdown: device added (path: /sys/devices/virtual/net/ppp0, iface: ppp0): no ifupdown configuration found.
Jul 25 23:17:09 XPS-M1530 NetworkManager[867]: <warn> /sys/devices/virtual/net/ppp0: couldn't determine device driver; ignoring...
Jul 25 23:17:09 XPS-M1530 pppd[3823]: Using interface ppp0
Jul 25 23:17:09 XPS-M1530 pppd[3823]: Connect: ppp0 <--> /dev/pts/3
Jul 25 23:17:09 XPS-M1530 pptp[3826]: nm-pptp-service-3820 log[main:pptp.c:314]: The synchronous pptp option is NOT activated
Jul 25 23:17:09 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 1 'Start-Control-Connection-Request'
Jul 25 23:17:09 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_disp:pptp_ctrl.c:739]: Received Start Control Connection Reply
Jul 25 23:17:09 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_disp:pptp_ctrl.c:773]: Client connection established.
Jul 25 23:17:10 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_rep:pptp_ctrl.c:251]: Sent control packet type is 7 'Outgoing-Call-Request'
Jul 25 23:17:10 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_disp:pptp_ctrl.c:858]: Received Outgoing Call Reply.
Jul 25 23:17:10 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_disp:pptp_ctrl.c:897]: Outgoing call established (call ID 0, peer's call ID 35339).
Jul 25 23:17:10 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_disp:pptp_ctrl.c:950]: PPTP_SET_LINK_INFO received from peer_callid 0
Jul 25 23:17:10 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_disp:pptp_ctrl.c:953]: send_accm is 00000000, recv_accm is FFFFFFFF
Jul 25 23:17:10 XPS-M1530 pptp[3841]: nm-pptp-service-3820 warn[ctrlp_disp:pptp_ctrl.c:956]: Non-zero Async Control Character Maps are not supported!
Jul 25 23:17:10 XPS-M1530 pppd[3823]: EAP: unknown authentication type 26; Naking
Jul 25 23:17:10 XPS-M1530 pppd[3823]: EAP: peer reports authentication failure
Jul 25 23:17:10 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_disp:pptp_ctrl.c:950]: PPTP_SET_LINK_INFO received from peer_callid 0
Jul 25 23:17:10 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_disp:pptp_ctrl.c:953]: send_accm is FFFFFFFF, recv_accm is FFFFFFFF
Jul 25 23:17:10 XPS-M1530 pptp[3841]: nm-pptp-service-3820 warn[ctrlp_disp:pptp_ctrl.c:956]: Non-zero Async Control Character Maps are not supported!
Jul 25 23:17:11 XPS-M1530 pppd[3823]: Connection terminated.
Jul 25 23:17:11 XPS-M1530 NetworkManager[867]: <warn> VPN plugin failed: 1
Jul 25 23:17:11 XPS-M1530 NetworkManager[867]: SCPlugin-Ifupdown: devices removed (path: /sys/devices/virtual/net/ppp0, iface: ppp0)
Jul 25 23:17:11 XPS-M1530 pptp[3841]: nm-pptp-service-3820 log[ctrlp_disp:pptp_ctrl.c:912]: Received Call Clear Request.
Jul 25 23:17:11 XPS-M1530 pptp[3826]: nm-pptp-service-3820 warn[decaps_hdlc:pptp_gre.c:204]: short read (-1): Input/output error
Jul 25 23:17:11 XPS-M1530 pptp[3826]: nm-pptp-service-3820 warn[decaps_hdlc:pptp_gre.c:216]: pppd may have shutdown, see pppd log
Jul 25 23:17:11 XPS-M1530 pppd[3823]: Exit.

It's late here (UK) so I may not be able to reply to any posts until tomorrow.

[Stormhunter]

Hi. I found this on the Fedora web site and this looks like same problem you are having.

the log shows you're using EAP authentication. ms vpn's only like require-mppe, you have to refuse the other authentications:

refuse-pap
refuse-eap
refuse-chap
refuse-mschap
require-mppe

that would go in the /etc/ppp/options.pptp file.

if you're using network manager, go to the advanced settings window, and make sure only MSCHAPv2 is checked. uncheck the others (pap, chap, mschap, eap).

---------- Post added at 05:52 AM CST ---------- Previous post was at 05:46 AM CST ----------

oops, while your in the advanced window, also enable the mppe stuff.

[blunderbus]

Although it looks like Network Manager is installed I'm not sure that it's running as I don't get the options you describe. I can edit the VPN connection via 'Networking' but no authentication options there.

I'm connecting to a Windows network via a Sonicwall firewall with remote access enabled on Windows server. Windows VPN clients can connect using AD credentials.

[Stormhunter]

Hi it might be that you are trying to do it through Windows. I have just done a VPN on mine which is Linux and it works. May be you should try doing it in linux rather than windows. You could try going to your VPN provider and see if there is a installer you can download for your particular windows or linux as mine did.

Chris

[blunderbus]

Hi it might be that you are trying to do it through Windows. I have just done a VPN on mine which is Linux and it works. May be you should try doing it in linux rather than windows. You could try going to your VPN provider and see if there is a installer you can download for your particular windows or linux as mine did.

Chris

Thanks Chris - I'll try this tomorrow.

Mike

[blunderbus]

Apologies for the delayed reply - I've not made any progress in checking re the firewall. I'm now going to look at installing TeamViewer instead.