Finally managed to re-connect to the Lancaster University VPN. It used to work, then didn’t, now works again. Maybe due to some combination of regression and bug fixes in Ubuntu, and my tinkering with the options. One Ubuntu forums post in particular was helpful.
Install the network-manager-pptp package to enable VPN connections in the network manager GUI.
Right now I’ve only set the gateway and user name on the VPN tab. Don’t set the password, there is a bug related to this. In the advanced options uncheck PAP and EAP authentication, check CHAP, MSCHAP and MSCHAPv2. Check MPPE and allow stateful encryption. Uncheck all the compression options. Check ’send PPP echo packets’.
Under the IPv4 Settings tab set the method to Automatic (VPN). Uncheck everything in Routes and delete all routes.
After applying these settings restart the network manager with sudo /etc/init.d/NetworkManager restart.
I’m sure the routes can be modified without breaking the connection but I’m not sure about the rest. This works for me as of today.
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