Multi hop OpenVPN and wrong interface. Issue or bad configuration?

[rob.stewart]

Hello all,

maybe someone could explain this very interesting observation. I will try to explain my pfsense (2.4.4-p3) setup. I am using two VPN providers to get 2 hops VPN on pfSense. Something like this:
LAN -> VPN_hop2 -> VPN_hop1 -> WAN

OpenVPN client for VPN_hop1 is configured to use WAN interface and VPN_hop2 is configured to use VPN_hop1 interface to originate VPN connections. Seems that this configuration is working fine, LAN is going to internet through double tunnel. But what I observed, when VPN_hop1 is down and VPN_hop2 connection restarts it finds another way (WAN) to originate its connection and VPN_hop2 configuration which as I said is set to use VPN_hop1 interface is ignored. Why this is happening? Are there ways to stop doing that? I tried to play with FW floating rules but no success.
Thanks for helping

Rob