How to restrict Highports in AIX 5.2

Hello,

I am using wu-ftp 2.4.2 in AIX 5.2. I wanted to restrict high ports for dataconnection. by default dataconnection ports will be from range 1024 to 65536. But i wanted to restrict it to some range like 10000 - 10500. This setting is to enable ports at client firewall.

Please let me know..