[CVALE] pppd routes

[Patrick Bennett]

anyone know how to elegantly deal with the following situation?

the goal is to have a modem/dial-in linux pppd server so that a user who 
dials into it will have their entire lan connected to the entire lan of 
the dial-in server.  there will be multiple users dialing in and their 
local subnets will be different, but known ahead of time.  also, the 
dial in server will have a default route to the internet that must be 
respected.

the place i'm caught is in how to elegantly set up the 
(non-default/static) routes between the two lans, esp. on the modem 
server's side.  i've been able to accomplish this in a sort of hacked up 
way by using a putty definition that the user clicks on that asks for 
the root password and sets a route (i can trust the guinea pig user with 
the root password, but don't want to give it to everybody if i can avoid 
it... and yes, i could keep the hack and use sudo, but i'd rather 
eliminate the hack).

does anyone have a suggestion on how to make the route setup happen 
automagically so that each user gets the route to their lan set properly?

    -patrick