| 哦,连接成功了,但是 还是和cutftp一样,什么都没有,是空的 220 Serv-U FTP Segrver v6.4 for WinSock ready...USER aspcndown
 331 User name okay, need password.
 PASS xxxxxx
 230 User logged in, proceed.
 SYST
 215 UNIX Type: L8
 PWD
 257 "/" is current directory.
 TYPE A
 200 Type set to A.
 PORT 127,0,0,1,9,20
 200 PORT Command successful.
 LIST
 150 Opening ASCII mode data connection for /bin/ls.
 426 Data connection closed, transfer aborted.
 PASV
 227 Entering Passive Mode (211,155,230,74,4,17)
 错误:  [数据]: 连接被拒绝
 错误:  [数据]: 连接被拒绝
 
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