Ok,

People can connect now but cant get a dir listing.  Sounds like a 
passive problem.  Here are my settings:
proftpd running on 192.168.1.102 on port 60000 with passive ports set to 
50000-51000.
monowall on WRAP with the following inbound nat rules:

WAN TCP 50000 - 51000 192.168.1.102 50000 - 51000 Passive Ports
WAN TCP 59999 - 60000 192.168.1.102 59999 - 60000 FTP connect

the firewall rules are:

TCP * * 192.168.1.102 59999 - 60000 NAT FTP connect
TCP * * 192.168.1.102 50000 - 51000 NAT Passive Ports

So, in a nutshell.  The control port and active port (60000 and 59999) 
are forwarded and allowed.  The passive ports (50000-51000) are 
forwarded and allowed. This should work however people tell me they can 
connect but not get directory listings.

Am I missing something?

Mark