1。 Connect the corresponding linux host and enter the linux command line state waiting for shell instructions. 2. Enter the shell command at the linux command line: ps-efgreftp.

3. Finally, press Enter to execute the shell command. At this time, you will see that the ftp process has been successfully queried, indicating that the ftp function is turned on.

What is the control port of FTP?

The default port of FTP is 20,21.

The difference between FTP port number 20 and 2 1 is that one is a data port and the other is a control port. The control port is generally 2 1, but the data port is not necessarily 20, which is related to the application mode of FTP. If it is active mode, it should be 20. If it is passive mode, it is decided by the server and the client through negotiation.

Two kinds of connections: command connection (control connection) and data connection.

What is the default port of ftp?

The default port of FTP is 20,21.

The difference between FTP port number 20 and 2 1 is that one is a data port and the other is a control port. The control port is generally 2 1, but the data port is not necessarily 20, which is related to the application mode of FTP. If it is active mode, it should be 20. If it is passive mode, it is decided by the server and the client through negotiation. I hope I can help you!

What do you think of the IP port number when xftp connects to Windows?

You need to open the FTP service on Windows. Port is the port where you open the service, and IP is the IP address of your Windows.

How to open ftp passive port?

Open the ftp passive port like this:

First, the system opens the port number.

According to the working principle of passive mode, passive mode needs to open a port range (generally greater than 1024), such as 30000~3 1000.

CentOS6 open ports can operate as follows:

Open edit iptables,

vim/etc/sysconfig/iptables

When you see this line, copy a new line and change the port "22" to "30000:3 1000".

-a input-mstate-state new-mtcp-ptcp-d port 22-jACCEPT

Restart and refresh iptables.

serviceiptablesrestart

CentOS7 open port operation, you can click here to view.

Then, modify the configuration file.

Modify/add the following 3 lines:

Pasv _ enable = Yes

pasv_min_port=30000

pasv_max_port=3 1000

The port range here is 30000~3 1000.

Finally, restart the vsftp server.

Execute the following command:

servicevsftpdrestart

What is the default port number of ftp?

Default port 2 1

FileTransferProtocol (FTP) is a set of standard protocols that use client/server mode to transfer files on the network. Belonging to the application layer of the network transmission protocol. The difference between filetransfer and fileaccess is that the former is provided by FTP and the latter is provided by NFS and other application systems.