ipf如何设置ftp功能啊

zhou001sheng

大家帮忙！！！！
我在freebsd6。1上设置了一个ipf；设置后从bsd ftp到redhat时执行到ls就显示不出来了；bsd ftp到window的serv-u就很正常；停掉ipf就可以正常ftp到redhat执行ls、get、put等。
我的ipf规则是这样的：
pass in quick on bge0 proto tcp from any to any port = 21 flags S keep state
pass in quick on bge0 proto tcp from any to any port = 20 flags S keep state
pass out proto tcp all keep state
是什么设置错误啊，应该怎么设置啊

我把ipf的规则改成这样还是不行：
pass in quick proto tcp from any to any port = ftp flags S/SA keep state
pass in quick proto tcp from any to any port = ftp-data flags S/SA keep state
pass out proto tcp all keep state

应该怎么修改啊！！！