I need to authenticate using a one time password device to a PPTP VPN gateway. This used to work fine before Ubuntu 11.10 (i.e. before network-manager-pptp 0.9.0). For instance with Ubuntu 11.04 (using network-manager-pptp-0.8.1+git.20110207t142407.7e1d989), I would be prompted for my password when starting the PPTP connection, I would enter the password generated by my OTP device and I would NOT tick the "Save passwords in keyring" box.

However with the 0.9.0 version of network-manager-pptp this option no longer exists, so it will only work once. A new attempt to start the VPN will use the password stored in the keyring, which will of course not work. This means I have to manually remove the password from the keyring.

This change was introduce with the following commit:

commit 48a7dee3e950d84be497cf726fad50a17555bf5e
Author: Dan Williams <dcbw redhat com>
Date:   Mon Jul 18 11:40:03 2011 -0500

    auth-dialog: use a simplified password request dialog
    
    Strip out all the stuff we don't care about (mainly the keyring
    remember stuff).

The same change was also made in the openvpn equivalent, but there it was also changed to make changing the password a permanent option, i.e. choosing between "Saved", "Always ask" and "Not required". This was done in the following commit to network-manager-openvpn:

commit 0f4daf4570f1777c84040053299fa8adb636bf74
Author: Dan Williams <dcbw redhat com>
Date:   Wed Jul 13 21:53:29 2011 -0500

    properties: add password type combo (saved, ask, not required)
    
    Like vpnc has; they map directly to the NM internal secret flags and
    allows better support for user preference or one-time-pad tokens.

Please also make the equivalent change to the PPTP VPN.
Feel free to contact me for more information or testing of the possible changes.