I am trying to replace an old box with Rpi to simply provide a VPN connection to some remote point from my LAN
All the parts seem to work. From the Rpi I can ping etc local and remote devices and vice versa.
However I can't get a connection between devices on my LAN and the remote LAN.
The firewall is off. The Rpi just has a single Ethernet connector and has two ethernet interfaces - one the ethernet interface and the tunnel interface.
Routes define which interface to use to access the local and remote LAN addresses.
It is as though the Rpi/Stretch doesn't know how route between the two interfaces.
There is no special configuration that I know of in the old Redhat box I am replacing or the other end of the VPN on a Busybox based switch, they just have disabled firewalls and appropriate static routes defined.
Any advice welcome Thankyou