incoming port forwarding not working 3.3.22

Hello,

My internal machines can access the internet fine, but I cannot get
the incoming port forwarding (ftp/smtp) to work. Below are my ipnat and ipf
conf files.
-------------------------------------
ipnat.conf

# Outgoing ftp client active transfers to the internet
#####################################
map iprb0 172.16.100.0/24 -> xxx.xxx.xxx.xxx/32 proxy port ftp ftp/tcp
#####################################
# Shoehorn translated connections tcp/udp to port range 40000-60000
#####################################
map iprb0 172.16.100.0/24 -> xxx.xxx.xxx.xxx/32 portmap tcp/udp 40000:60000
#####################################
# NAT mapping for all other protocols
#####################################
map iprb0 172.16.100.0/24 -> xxx.xxx.xxx.xxx/32
#####################################
# mail
#####################################
rdr iprb0 0.0.0.0/0 port 25 -> 172.16.100.125 port 25
#####################################
# ftp
#####################################
rdr iprb0 0.0.0.0/0 port 21 -> 172.16.100.125 port 21
-------------------------------------
ipf.conf

# iprb0 = external internet interface
# iprb1 = internal lan interface
####################################
# allow loopback to run free
####################################
pass in quick on lo0 all
pass out quick on lo0 all
####################################
# ftp:
####################################
pass in quick on iprb0 proto tcp from any to 172.16.100.125/32 port = 21
flags S keep state
####################################
# smtp:
####################################
pass in quick on iprb0 proto tcp from any to 172.16.100.125/32 port = 25
flags S keep state keep frags
pass out quick on iprb0 proto tcp from 172.16.100.125/32 to any port = 25
flags S keep state keep frags
####################################
# pass traffic from lan to internet tcp/udp/icmp
####################################
pass in quick on iprb1 proto tcp from 172.16.100.0/24 to any keep state
pass in quick on iprb1 proto udp from 172.16.100.0/24 to any keep state
pass in quick on iprb1 proto icmp from 172.16.100.0/24 to any keep state
pass out quick on iprb0 proto tcp from 172.16.100.0/24 to any keep state
pass out quick on iprb0 proto udp from 172.16.100.0/24 to any keep state
####################################
# block everything else
####################################
block in quick all
block out quick all