From the FAQ section:
Can I define which users have PPTP access?
Yes. By default, all users (whose accounts are activated) can establish PPTP access to the server, if the number of allowed PPTP connections allows it. See section 4.1 of the e-smith user manual for a description of the Point-to-Point Tunnelling Protocol (PPTP).
In order to disallow PPTP access for a specific user, say "pauln", perform the following commands as root:
Turn PPTP Access off for pauln:
/sbin/e-smith/db accounts setprop pauln PPTPAccess off
Update remote access:
/sbin/e-smith/signal-event remoteaccess-update
The user pauln is no longer able to establish a PPTP connection to the e-smith server.
It's amazing what this website has to offer when you poke around and read everything.

Terry
ryan wrote:
>
> Joe, I am interested to know how you block your SME users
> from VPN access? All users on a SME server have VPN access
> if you have enabled PPTP. Please post how you control this.
>
> Thanks,
>
> RS