Special features of FTP:
Most TCP services use a single connection. Generally, the client initiates a connection to a slave port of the server and then uses this connection for communication. However, the FTP protocol is different. It uses multiple
FTP active and passive working mode-Linux Enterprise Application-Linux server application information. The following is a detailed description. Article from: http://linux.net527.cn/fuwuqiyingyong/Ftpfuwuqi/38774.html
What is PASV mode (passive mode
Configure passive mode in Win 2003
Passive mode FTP connection Is sometimes referred to as "Server Management", because the server end port used as a data connection with one of the transient ports server responds to the client PASV Command ,.
Set Serv-u FTP to support passive mode connections
Early in the morning by a friend said FTP never even go up, I remove the passive mode can connect.
This problem has been bothering me for a long time, which is the following article to solve it.
Build FTP on LinuxImportant to solve how to build FTPResolve user-specified access to its root directoryResolving Access FTP timeout connectionsSolve the FTP active connection, passive connection problem1. Install FTP Close the firewall before
Installation: sudo apt-get install vsftpd
# VSFTP (Very secure FTP) is a very secure and fast-stable FTP server in Unix/linux
After installation, you may automatically generate an account "FTP",/home will also add a folder.
If you do not generate
FTP is the abbreviation for file Transfer Protocol (document Transfer Protocol), and Chinese is called "Interfax protocol". Used for two-way transmission of control files on the Internet. At the same time, it is also an application (application). It
Iptables supports Active and Passive FTP protocol configuration in two ways: PORT and PASV. the Chinese meaning is active and passive. Port mode: ftpserver: tcp21 -- client: dynamicftpserver: tcp20 -- client: dynamicPasv mode: ftpserver: tcp21 --
Special features of FTP:Most TCP services use a single connection. Generally, the client initiates a connection to a slave port of the server and then uses this connection for communication. However, the FTP protocol is different. It uses multiple
Http://www.cppblog.com/mydriverc/archive/2010/03/14/109670.html
First, understand the active-passive connection mode:
The FTP protocol can work in two ways: Port and PASV. The Chinese meaning is active and passive.
PortMode: FTP server: TCP21
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