Looking for an elegant solution.
Have VOIP PBX system on the LAN that connects to a SIP trunk provider. Have 2 ISP circuits and a basic Fail Over - one circuit is DSL. When the primary circuit goes down, fails over to the DSL. I want to block traffic from the VOIP PBX through the DSL circuit because it's too slow (The PBX will actually failover to its POTS lines if it can't reach the internet, which is what I want)
Access rules don't work because they are zone based and the PBX is in the LAN zone.
Was advised to specify the outbound interface in the NAT policy to the interface of the primary circuit, but this didn't seem to work because there's a default policy that kicks in for Any outbound interface.