Setting up a box only for traffic shaping question

[poseyjmac]

I just want a pfSense box to do some traffic shaping but no extra firewall stuff outside of making rules based on the traffic shaping queues.(there's already a firewall)

To set this up correctly, does this mean I make a rule in WAN on pfSense saying: allow everything to go everywhere.  and then put my traffic shaping rules above that rule?