Shulou(Shulou.com)06/01 Report--

When using ftp, we often encounter errors in the file list after ftp links, just because the mode of ftp is incorrect, how to set the working mode of ftp, what is active mode and what is passive mode, and what is the difference between active mode and passive mode. Today * * collects relevant materials and methods for setting the working mode of common ftp software:

What are PASV and PORT methods

(1) PORT is actually another name for Standard pattern, also known as Active pattern. It means "active mode" in Chinese.

(2) PASV is the abbreviation of Passive. Chinese is "passive mode".

Second, the difference between the two

The difference is that the PORT (active) approach requires the server to send data through its own TCP 20 after the TCP 21 port is connected. And a new connection needs to be established to transfer files. The PORT command contains some useless information on the client, so there is the emergence of PASv. The PASV mode has the advantages of the PORT mode and removes some of the disadvantages of PORT. The way PASV works is that when the server receives a client connection request, it automatically selects one of the ports 1024 to 5000 at random to establish a connection with the client to transfer data. Because the connection is passive and automatically established, it is vulnerable to *, so the security is poor.

Third, the common switching methods between PORT mode and PASV mode of FTP client software.

Most FTP clients use PASV by default. IE uses PORT by default. In most FTP client settings, the common words are "PASV" or "passive mode", and words such as "PORT" or "active mode" are rarely seen. Because there are only two ways to log in to FTP: PORT and PASV, canceling PASV means using PORT.

(1) IE: tools-> Internet options-> Advanced-> "use passive FTP" (above IE6.0 is required).

(2) CuteFTP:Edit-> Setting-> Connection-> Firewall-> "PASV Mode" or File-> Site Manager, select site-> Edit-> "Use PASV mode" on the left.

(3) FlashGet: tools-> options-> proxy Server-> Direct connection-> Edit-> "PASV Mode".

(4) FlashFXP: options-> Parameter selection-> Agent / Firewall / identity-> "use passive Mode" or site Management-> corresponding site-> options-> "use passive Mode" or Fast connection-> switch-> "use passive Mode".

# FTP

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