I have done some research and I have end up with this: http://pptpclient.sourceforge.net/howto-diagnosis.phtml#lcp_protrej_1
According with pptpclient documentation the "unsupported protocol" error is caused by "the MPPC patch to pppd is not compatible with kernel * MPPE kernel module" Can anyone confirm if this could be the cause ? -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to network-manager-pptp in Ubuntu. https://bugs.launchpad.net/bugs/290178 Title: pptp vpn connection drops out Status in “network-manager-pptp” package in Ubuntu: Confirmed Bug description: I use pptp vpn to connect to our office network. Under Hardy using Network Manager (NM 0.6.6) this worked very well and was stable. Under Intrepid NM0.7 the same connection is unstable. While it connects without a problem and i can initiate Remote Desktop Protocols etc... eventually the connection drops out with the error VPN connection failed. I can usually reconnect immediately, but not always, if not a restart is usually required. Reconnected VPN connectiions continue to be unstable and fail frequently thereafter. Interestingly, opening pidgin precipitates this connection failure (not sure about other applications). To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/network-manager-pptp/+bug/290178/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
