nat on fxp1 from 192.168.1.0/24 to any ->51.143.182.38
pass out on $ext_if proto udp from any to any port $udp_server keep state
block drop out quick on fxp0 from 192.168.1.17 to any
block drop out quick on fxp0 from 192.168.1.21 to any
block drop out quick on fxp0 from 192.168.1.10 to any