# macros
ext_if="rl0"
int_if="xl0"
tcp_services="{ 22, 113 }"
icmp_types="echoreq"
# options
set block-policy return
set loginterface $ext_if
set skip on lo
# scrub
scrub in
# nat/rdr
nat on $ext_if from $int_if to any -> ($ext_if)
nat-anchor "ftp-proxy/*"
rdr-anchor "ftp-proxy/*"
rdr pass on $int_if proto tcp to port ftp -> 127.0.0.1 port 8021
#rdr on $ext_if proto tcp from any to any port 80 -> $comp3
# filter rules
block in
pass out keep state
anchor "ftp-proxy/*"
antispoof quick for { lo $int_if }
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 inet 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 quick on $int_if