#Macros
int_if = "sis0"
ext_if = "rl0"
tcp_services = "{ 22, 80 }"
icmp_types = "echoreq"
priv_nets = "{ 127.0.0.0/8, 192.168.0.0/16, 172.16.0.0/12, 10.0.0.0/8 }"
comp3 = "192.168.99.2"
# options
set block-policy return
set loginterface $ext_if
set skip on lo0
# scrub
scrub in all
# nat/rdr
nat on $ext_if from $int_if:network to any -> $ext_if
rdr on $ext_if proto tcp from any to any port 80 -> $comp3 port 80
# filter rules
block all
block drop in quick on $ext_if from $priv_nets to any
block drop out quick on $ext_if from any to $priv_nets
pass in on $ext_if inet proto tcp from any to ($ext_if) \
port $tcp_services flags S/SA keep state
pass in on $ext_if proto tcp from any to $comp3 port 80 \
flags S/SA synproxy state
pass in inet proto icmp all icmp-type $icmp_types keep state
pass in on $int_if from $int_if:network to any keep state
pass out on $int_if from any to $int_if:network keep state
pass out on $ext_if proto tcp all modulate state flags S/SA
pass out on $ext_if proto { udp, icmp } all keep state