connection tracking multi wan

how can I tell what wan link a user is going out?
I have 3

example
host 1.1.1.1 pings 8.8.8.8
how can I tell what wan link the ping is going out and coming in on?

I have torched lan and see the traffic
but don’t see any 8.8.8.8 traffic on any of the 3 wan links.

Thanks
Tom

The the absence of any policy routing, packets always e-gress on the interface with active default route with lowest distance.

for the most part my clients use 2 wan connections
i try to make my dns services (mail, web, etc) use the 3rd

here is my routing rule


1 A S ;;; favor wind 3 to 1
dst-address=0.0.0.0/0
gateway=x.x.x.x,y.y.y.y,y.y.y.,y.y.y.y
gateway-status=x.x.x.x reachable ether3-GPW,y.y.y.y
reachable ether4-Wind,y.y.y. reachable ether4-
Wind,y.y.y. reachable ether4-Wind
check-gateway=ping distance=1 scope=30 target-scope=10

thanks
tom