I need a special case and I am not sure it can exist with NAT (SNAT or DNAT)
I have two lan networks with IP range : 10.10.1.1/24 and 10.10.2.1/24. The connection between then is done with a linux machine with two ethernet cards.
The first network has a mix of computer and VoIp devices and and the second only computers.
In the second network a pptp vpn server providing internet access (the first nat) is in action and selected computers from both networks are connected and take a 192.168.0.1/24 address in a virtual interface and have Internet access.
I want to give access to the internet to some VoIP and other hardware that can not use the pptp vpn server in the first network (10.10.1.1/24).
I have the idea to configure the linux machine to connect to the pptp vpn server and then have it acting as a NAT machine for the machines in the first network (10.10.1.1/24) using the same IP address range. In other words, the linux machine has to simply route ip traffic to the ethernet interface with destination the subnet 10.10.2.1/24 and acting as NAT if the destination is the internet.
Is that possible? Do you know where I can find an examlple close to that to start with ?
Thank you in advance Dimitris
