localnet = "{ fxp1, em0 }"
service = "proto udp"

nat on fxp0 inet from !(fxp0) to any -> (fxp0:0)
block all

#
#   Deliver DHCP server response from the ISP.
#

pass in quick on fxp0 $service from any port boot ps \
	to any port bootpc keep state
pass out quick on $localnet $service from any port \
	bootps to port bootpc
#
#   Deliver DHCP client request to my ISP
#

pass in quick on $localnet $service from 0.0.0.0 port bootpc \
	to 255.255.255.255 port bootps keep state
pass out quick on fxp0 $service form $localnet port bootpc \
	to 255.255.255.255 port bootps