???????ftp??????????????????vsftpd?????????vsftpd????????????ftp??????????????????????????????????????
????vsftpd????????ü????????????????????п??? Linux????? man 5 vsftpd.conf????
?????????????????ftp???????????????????￡?
????1.???ftp????
??????????ftp???????Э?飬????ο?RFC
??????????????????????汾??https://github.com/zilandy/zFTP ??doc
????2.????????
???????????????????в??? ???? vsftpd.conf
????3.???ж??
???????????з???????е??????????????????????
?????磺?? idle_session_timeout=600
????4.??????????
?????????????     max_clients=50
????????IP?????? max_per_ip=5
????5.????
??????? ?????????????
????local_max_rate=100(kb)
????6.???????
???????????????????????