pfSense

Creating a static route on the pfSense box allows routing from the 10.20.2.0 network back across the (pptp) vpn to the 192.168.12.0 network, however as soon as the VPN disconnects, the static route is removed from the routing table (I assumed this is a correct action) though the route is still defined in the "System:Static Routes" table.

(the route in my configuration is : 192.168.12.0/24 192.168.13.2 UGS 0 12558 1456 pptpd0)

When the VPN reconnects, the static route is not reinstated and must be re-instated to bring the routing back online. This can be achieved by removal or the "System: Static Routes" entry, or simpy clicking through the Edit -> Save -> Apply screens.

(192.168.12.0/24) <-> Cisco Router (192.168.13.2 <-> 192.168.13.1 -- PPTP VPN Tunnel) pfSense <-> 10.20.2.0/24