local_nets = "{ 10.1.0.0/16, 192.168.169.0/24 }"
non_route = "{ 10.0.0.0/8, 192.168.0.0/16 }"

set skip on lo

set timeout { udp.first 300, udp.single 150, udp.multiple 900 }

pass

match out on em0 from $local_nets to !$non_route nat-to 1.1.1.1