The rabbits and other animals will continue to get under the porch unless you enclose underneath it. I would just enclose the area under the porch and put a one way door, leading out, so the rabbits can leave, but not get back in.
Keith
They want them gone not just moved.
In that case, just block the area under the porch off, leave a few escape hole and put connibears over the escape holes. Once the rabbits are caught, block it all off, so no more can move in.
Keith