FTP 模式: Active, Passive
server端設置不正確,會導致客戶端無法連接上FTP
在DOS中,默認是Active
在Unix中,默認是Passive
FTP server / client 軟件
Filezilla, free, opensource
Cerberus FTP Server, not free
U-server, not free
Core-FTP, free
Ref:
http://hi.baidu.com/runhuawang/blog/item/3559bb2b1cc86cf8e7cd4077.html