Port Sftp Traffic
Port 20 is the most commonly used data connection.
Port sftp traffic. The ftp server source port is tcp port 20. The default ssh port is 22. I wrote the initial version of ssh secure shell in spring 1995. It has the assigned port number 22 tcp although it could be changed to any port on the ssh server.
The ftp server opens a new inbound connection to the ftp client on the port indicated by the ftp client in the port command. The use of the ssh protocol is highly recommended in case of need for communication with other computers switches routers servers or any host. When i tatu ylonen first published this story in april 2017 it went viral and got about 120 000 readers in three days the story of getting ssh port 22. Sftp which stands for ssh or secure file transfer protocol usually runs on port 22 but can be assigned whatever port you want and is a way for transferring files between machines over a secure and encrypted connection unlike ftp which transfers data over an insecure and unencrypted connection.
This is a story of how it got that port. Sftp is a subsystem of the ssh service or daemon. Some of the most popular applications that implement this protocol are putty and winscp. In this example.
Below we provide an overview of the commonly used control and data ports for ftp and ftp over tls ssl commonly known as ftps connections. Sftp protocol is generally provided by ssh servers by default. Linux sftp command with examples. The transmission control protocol tcp and the user datagram protocol udp needed only one port for full duplex bidirectional traffic.
This is a list of tcp and udp port numbers used by protocols of the internet protocol suite for operation of network applications. The stream control transmission protocol sctp and the datagram congestion control protocol dccp also use port numbers. In computing the ssh file transfer protocol also secure file transfer protocol or sftp is a network protocol that provides file access file transfer and file management over any reliable data stream it was designed by the internet engineering task force ietf as an extension of the secure shell protocol ssh version 2 0 to provide secure file transfer capabilities. So this makes sftp listen tcp 22 port.
It is not a coincidence. How ssh port became 22. In this tutorial we will learn the default sftp port and how to change it to a different one.