pptp vpn client setup

Open Network Configuration (Start, System, Preferences).

Highlight your VPN connection, hit Edit.

At IPv4 Settings Tab: choose method Automatic (VPN).

At VPN Tab:

1 - input the IP address of the target computer.

2 - input your user name. Leave all else blank.

3 - hit Advanced button.

At Authentication:

1 - UNcheck PAP (because PAP means to allow unsecured passage - this is the source of "no shared shared secrets")

2 - Check CHAP, MSCHAP and MSCHAPv2.

At Security and Compression:

1 - Check Use Point-to-point encryption (MPPE)

2 - Select 128-bit (most secure).

3 - Check Allow stateful encryption.

At Echo: check Allow PPP echo packets.

Leave all else blank. Hit OK, OK to save and get out.

Note: Your password is requested on VPN startup. I did not try to add it to the keyring.