The client tells the server through the command channel "the server connects to itself and the port number it can open to be connected to is greater than 1024" After the firewall receives the information, it forwards it to the server. Use port 21 to establish a connection with the client. The client tells the server through the command channel "service end of their connections and open his own can be connected to its port number greater than 1024," the server will automatically turn on after receiving the data sent by the client Message 2 0 port The data flow port proactively connects to the port opened by the client from the data flow port.Īctive connection in the form of commands and data streams-the client has a firewallīecause the client has a firewall, the server is not actively connected to the client, so the client will actively connect to the server.The firewall receives the data from the client and forwards it to the server.The server will take the initiative after receiving the information from the firewall. The client responds to the command channel establishment is complete. The server opens port 21 and actively connects to a port of the client. Parse the server to actively link the client-the last line Linux ProFTPD: Professional FTP daemon An FTP server program on a Unix platform or Unix-like platform such as Linux, FreeBSD, etc.Īctive connection in the form of commands and data streams - the client has no firewall Port 20 (data transfer) 21 (command transfer) The role is a protocol used to transfer files on the Internet.įeatures secure, high-speed and stable FTP server
From this name, it can be seen that the original intention of the compiler is code security.
#Best ftp program to transfer coin ops software
VSFTP is an FTP server software used on Unix-like systems released under the GPL. They provide services in accordance with the FTP protocol. The FTP server File Transfer Protocol Server is a computer that provides file storage and access services on the Internet. Access VSFTP with actual username and passwordĪccess VSFTP in actual ftp virtual account
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