Routing network through VPN Tunnel from specific interface

  • Hi,

    I've got pfsense installed on my watchguard x550e. Runs fine :-)
    Need to do following task:

    pfsense has a vpn tunnel up, openvpn (IP masq service).
    By now all traffic from Interface 1 to 3 is routed through my default ISP Gateway.
    I need to route all traffic on Interface 2 through VPN and need to prevent routing through ISP Gateway on VPN down (free wifi offer).

    Can anybody please explain me how to do so?
    Best Regards,