no nat please

[Payal Rathod <payal-netfilter@xxxxxxxxxxxxxxxxx>]

Hi,
I use simple masquerading to allow my windows clients to browse the
net. But for one particular machine I need to connect it to VPN of
my client abroad. Now, the tech people at their end told me not
to nat that machine as nating would destroy the VPN part. How do I do that?
The machine IP address is 192.168.10.15.

With warm regards,
-Payal