Something is not clear to me with SSH authentication.
I have a Talend job which connects to sFTP (using SSH protocol) and on the property page of the component, I have the choice between: 1. Password authentication 2. PublicKey authentication
When I choose Password authentication the data to enter are username and password. but when I choose PublicKey authentication the data to enter are username, password, private key path and private key pass-phrase.
I though when a PublicKey authentication is set on a server there is no need for a password.
Is the SSH enables an authentication using a public key and a password in the same time as a security enforcement or it is just a fallback which means if the public key is not authorized, the standard username/password will be used (if the sshd server permits it)?
OpenSSH 6.2 introduced multiple authentication methods.
For references, see sshd_config(5).
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