From the panel itself...
"Both TCP and UDP protocols may be defined however only TCP protocols forward. UDP protocols do not support forwarding and are simply opened on the firewall for inbound traffic."
You can specify destination ports, but it won't matter with UDP anyway. Also, I thought I remembered reading somewhere that the panel only supported single entries, not ranges. You just have to enter each one individually. I can't find it anywhere now, but I thought I remembered reading that somewhere.