routing VS nat

[James Pifer]

On Thu, 2006-03-09 at 08:43 -0500, James Pifer wrote:
> I'm trying to setup linux as a router instead of NAT over a VPN. Here
> are the details:
> 
> I have an FC3 machine running pptpclient. 
> I have pptp configured to do "LAN to LAN"
> I have the FC3 machine set to act as a router:
> 	/proc/sys/net/ipv4/ip_forward is set to 1
> After I make the connection I do iptables -F so it's wide open
> 
> When I try to use the connection the machine is still doing NAT. Is
> there a way to make this box act like a router over the VPN and NOT do
> NAT?
> 

Is there a better place for me to ask this question? I have asked simlar
question on the pptp-devel mailing list but have not received any
responses. 

Thanks,
James