pasv就是passive方式, 下面是我从flashget的帮助文件考的
usually, when retrieving files over FTP, two connections are used. One for commands and one for data. Command connection is set by the client and the data connection is set by server. In some cases (when using firewall for instance) both connections have to be set by the client. In such a cases the server goes to passive mode when a PASV command is sent from the client.作者: 2818599(超人) 时间: 2002-3-8 22:01:30 标题: 天啊!