请教ftp的一个model问题

casino19802002

相关联结http://www.isaserver.org/articles/How_the_FTP_protocol_Challenges_Firewall_Security.html
有这么一段：
It is important to note that the data connection will only be established upon receipt of the reply to the Transfer Service commands such as LIST, RETR, STOR. So, the FTP mode must be selected by the client before sending the appropriate Transfer Service command. Also, those Transfer Service commands wil get more than one reply: first a 'Positive Preliminary Reply' indicating the data transfer may start and after ending the data transfer a 'Positive Completion Reply'.

我的问题是我现在使用IE的方式（并且通过代理）来ftp://ftp.lib.pku.edu.cn
是属于什么模式？如果client端口是动态的，请问大家在FW上是如何处理的？

casino19802002

问题解决了
参阅：http://www.isaserver.org/articles/How_the_FTP_protocol_Challenges_Firewall_Security.html