使用命令登录不是默认端口的ftp server（Connection closed by remote host的原因）

如果登录的ftp server不是默认端口，在命令行中输入：

C:/Documents and Settings/yourname>ftp 172.28.1.1

Connected to 172.28.93.248.

Connection closed by remote host.

C:/Documents and Settings/yourname>ftp 172.28.1.1:80

Unknown host 172.28.93.248:80.

ftp> bye

C:/Documents and Settings/yourname>ftp 172.28.1.1 80

输出ftp的命令帮助

C:/Documents and Settings/yourname>ftp

ftp> open 172.28.1.1 80

Connected to 172.28.1.1.

220-FileZilla Server version 0.9.9 beta

220-written by Tim Kosse (Tim.Kosse@gmx.de)

220 Please visit http://sourceforge.net/projects/filezilla/
User (172.28.1.1:(none)): yourname

331 Password required for yourname

Password:

230 Logged on

ftp>