[pptp-server] how to hackup pptpd so it allows multiple tunnels to one box

[HVR]

Earlier i wrote the section below, after studying the problem some more 
i realize i need to start hacking pptpctrl.c to allow for multiple 
tunnels per ip-pair. can anyone on this list help me with this 
enhancement? or point me to a (better) implementation of pptp that 
allows multiple tunnels. if i dont do this they will go with a microsoft 
solution :(

HVR wrote:

> i have multiple clients behind a linux box doing NAT/MASQ: the first 
> client can connect just fine but once i start a 2nd one it somehow uses 
> the same tunnel and things get really screwy.
> 
> i searched the archives and found the trick to use ip aliasing on the 
> pptpd server but then all the clients need to know which ip is free and 
> which is used. another problem is that i will have dozens of clients so 
> extra ips are not a scalable solution.
> 
> now i am aware that this will break the pptp standard, but i have been 
> told that the M$ implementation of pptp server will do this just fine 
> buti really would like to create a linux based solution (if only to show 
> them you do NOT need windows in here).
> 
> Any leads/pointers on how i can solve my problem, if need be i will hack 
> up the source code for pptpd, if someone can tell me were to start looking.
> 
> H.
> 
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