I was wanting to turn of PPTP access for certain users temporarily  
tonight and I didn't see an easy way to do it.

Essentially this is the reason:  I'm working on a system that has  
access to VPN users and I need to shut down their access while I work  
on the system.  Unfortunately the system I'm working on needs to be  
running 'live', so I can't just shut it down so people don't use it.   
Instead, if I could just shut down the PPTP access for some of the  
users, that would be the easiest.  I don't want to shut it down  
completely, because I still need to access through it myself.

My temporary solution was just to change the external IP address of  
the m0n0wall and I'll change it back when I'm done.  (All of their  
other traffic is going through another router, so I'm not taking down  
other services by doing this.

Hopefully this makes sense.  If not, ask questions.  Thanks for any  
help you can provide.

Jimmy