Check that the remote FTP port is not blocked.
确认远程FTP端口没有阻塞。
By analyzing the FTP protocol, the article classifies the FTP statistical methods into three key issues, which are random port access, DPID processing and FTP port flux collection.
本文通过对FTP协议的分析，将FTP流量统计的方法归结为三个关键问题随机端口的获取、DPID的处理、FTP端口流量的采集。
By limiting the port access, it stops attacks on all the other services (such as file sharing) and FTP.
通过限制端口访问，可以阻止对其他所有服务(例如，文件共享)和FTP的攻击。
Set the FTP_SERVER and FTP_PORT variables to the hostname and port of the FTP server to which the results of the build will be copied.
将FTP_SERVER和FTP _ PORT变量设置为构建结果要复制到的FTP服务器的主机名和端口。
A server integrated technique is proposed, which integrates HTTP, FTP and user defined protocol together, and uses one TCP port and one thread to supply all web services.
提出服务器集成概念，将HTTP、FTP和用户自定义TCP测量协议集成，用一个端口和线程来提供所有网络服务。
Notice the difference in the PORT command in this example as opposed to the active FTP example.
注意把这个例子中的PORT命令和主动模式中的例子进行比较。
Make sure port transfer connections originate from port 20 (ftp-data).
确定传输联接端口从20开始(？)
It also analyzes some problems in FTP data connection with Passive mode and Port mode.
此外，还分析了FTP数据连接的主动模式和被动模式所遇到的安全问题。
Port, the most common value is 21, but you should confirm that value with the FTP site administrator also.
“端口”，最常用的值是21，但您同样应联系FTP站点管理员对该值进行确认。
The port number that is used to access the FTP server.
用来存取FTP 伺服器的通讯埠编号。
The port number that is used to access the FTP server.
用来存取FTP 伺服器的通讯埠编号。
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