incoming ftp not working 3.3.22

Hello,

I cannot get incoming ftp to connect to the internal server. Please
let me know what I am doing wrong. Thanks.

ipnat.conf:

map iprb0 172.16.100.0/24 -> xxx.xxx.xxx.xxx/32 portmap tcp/udp 40000:60000
map iprb0 172.16.100.0/24 -> xxx.xxx.xxx.xxx/32
rdr iprb0 xxx.xxx.xxx.xxx/32 port 21 -> 172.16.100.125 port 21

ipf.conf

pass in quick on iprb0 proto tcp from any to 172.16.100.125/32 port = 21
flags S keep state
pass out quick proto tcp all keep state
block in quick all

Brent Young