# Macros: define common values, so they can be referenced and changed easily.
ext_if="em0"                                            # The external interface
int_if="em1"                                            # The internal interface
external_addr="192.168.42.5"                            # Your public IP address
internal_net="192.168.69.0/24"                          # Your internal subnet
# Translation: specify how addresses are to be mapped or redirected.
# nat: packets going out through $ext_if with source address $internal_net will
# get translated as coming from the address of $ext_if, a state is created for
# such packets, and incoming packets will be redirected to the internal address.
nat on $ext_if from $internal_net to any -> ($ext_if)
# rdr: packets coming in on $ext_if with destination $external_addr:1234 will
# be redirected to 10.1.1.1:5678. A state is created for such packets, and
# outgoing packets will be translated as coming from the external address.
rdr on $ext_if proto tcp from any to $external_addr/32 port 80 -> 192.168.69.11 port 8080
rdr on $ext_if proto tcp from any to $external_addr/32 port 443 -> 192.168.69.11 port 8443
# Make sure we don't block any traffic
pass in all
pass out all