Bind OpenVPN to a specific upstream gateway (Multi-WAN)

[Packet Loss]

I've got two WAN connections provided by two separate routers, in front of the pfSense box.

Everything is working as desired, load balancing is working and I can point certain LAN segments to the different WAN gateways.

I'd like to be able to build two VPN's, one over each router so I can also load balance my OpenVPN traffic over the gateways.

Using the "Interface" option on the OpenVPN client configuration doesn't appear to work, both OpenVPN tunnels seem to ignore this setting when deciding where to route the OpenVPN connections.

I've also tried creating static routes for the two OpenVPN endpoint's on the Internet, one static pointing to the first WAN gateway, the second to the second WAN gateway but this also doesn't appear to work.

Anybody else know how to bind a specific OpenVPN client connection to a specific WAN gateway???