![]() ![]() The client then sends a request for file operations, the server checks the permissions for the operation and returns with success of failure. The server returns with success and sends its supported version of the SFTP subsystem to the client. The client then asks the server to start the SFTP subsystem. The server authenticates and replies if access has been granted. The client then sends the user ID and password to the server. It checks the signature with the server public key if it does not match the connection is aborted from this point. Now you should be able to login as root with your SSH keys. On the Port field section, you can leave it empty if the SCP configuration on your server uses the default port (22). Enter the web address or IP address of your server on the Host field. On the the Site Manager window, click the New Site button to add a new site. If the SFTP Protocol is specified, it is possible to specify the Logon Type as 'Key File' and specify the location of the private key file ( my-ssh-key ). Launch the FileZilla app on your computer and go File -> Site Manager (Ctrl+S). The signature is sent to the client, the client also calculates the hash of all data exchanged. This is done (I believe) in the profile settings in the Site Manager of the FileZilla client. The server replies with its parameters and its public key, the server calculates a hash of all data exchanged so far and signs it using its private key. The client then starts the key exchange using an algorithm supported by both and sends it to the server. ![]() The server sends its supported algorithms and a small amount of random data as a session cookie, the client also sends it supported algorithms and a random session cookies. ![]() The client then sends it SSH welcome message with the highest supported protocol version. ![]() An SFTP client like FileZilla sends a connection request to the server sends the SSH welcome message with the highest supported protocol version. SSH uses a public key cryptography to authenticate the server. SFTP uses an SSH protocol that provides a secure channel in a client server architecture. ![]()
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