Ipswitch WS_FTP Server supports multi-factor authentication for users over SSH. To log on to the SSH server, a user must authenticate with:
Users who require multiple factors to authenticate will not be able to logon to the SSH server if they do not fulfill both authentication requirements.
This option is not available to users in an Active Directory user database or Microsoft Windows user database since they cannot authenticate using a public key.
To configure multi-factor authentication for users:
If you do not enable password and public key authentication for the SSH listener and then require multi-factor authentication for a user, the user will not be able to authenticate to the server.
You must also configure the file transfer client to use one of these keys for authentication.
You can also require multi-factor authentication when creating a user account. See Creating user accounts for more information.
The file transfer client used to log on to the SSH server must support SSH2 in order to present both a valid username/password pair and SSH key during authentication.