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nextcloud-docs/admin_manual/configuration_files/external_storage/sftp.rst

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====
SFTP
====
Nextcloud's SFTP (SSH File Transfer Protocol) backend supports both password and
public key authentication.
The **Host** field is required. The default port is 22 (SSH).
For public key authentication, you can generate a public/private key pair from
your **SFTP with secret key login** configuration.
.. figure:: images/auth_mechanism.png
:alt: Generating an RSA key pair in the SFTP configuration.
After generating your keys, you need to copy your new public key to the
destination server to ``.ssh/authorized_keys``. Nextcloud will then use its
private key to authenticate to the SFTP server.
The default **Remote Subfolder** is the root directory (``/``) of the remote
SFTP server, and you may enter any directory you wish.
See :doc:`../external_storage_configuration_gui` for additional mount
options and information.
See :doc:`auth_mechanisms` for more information on authentication schemes.