Status: Resolving address of it11.svfree.net
Status: Connecting to 180.178.58.45:21...
Status: Connection established, waiting for welcome message...
Response: 220 Serv-U FTP Server v6.4 for WinSock ready...
Command: USER it11
Response: 331 User name okay, need password.
Command: PASS ******
Response: 230 User logged in, proceed.
Status: Connected
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is current directory.
Command: TYPE I
Response: 200 Type set to I.
Command: PORT 10,16,17,65,217,111
Response: 200 PORT Command successful.
Command: MLSD
Response: 550 Access is denied.
【Error: Failed to retrieve directory listing】 为什么会这样。。。在线等。。。