LARTC - Nov 2004 - PPtP over NAT

Hi!

I need that my private users behind NAT server, connect to PPtP Server on
Internet place:


Public IP (with PPtP Server)
|
|
Internet
|
|
Linux Server with NAT (public IP eth0, private IP eth1)
|
|
private LAN (users that need connect to PPtP Server)


I use some script with PREROUTING and POSTROUTING but is not work. Where I can
found info about this?

Thank!

David