atmoz/sftp

Easy to use SFTP (SSH File Transfer Protocol) server with OpenSSH. This is an automated build linked with the debian repository.

Usage

Define users as last arguments to docker run, one user per argument
(syntax: user:pass[:e][:[uid][:gid]]).
- You must set custom UID for your users if you want them to make changes to your mounted volumes with permissions matching your host filesystem.
Mount volumes in user's home folder.
- The users are chrooted to their home directory, so you must mount the volumes in separate directories inside the user's home directory (/home/user/mounted-directory).

Examples

Single user and volume

docker run \
    -v /host/share:/home/foo/share \
    -p 2222:22 -d atmoz/sftp \
    foo:123:1001

Using Docker Compose:

sftp:
    image: atmoz/sftp
    volumes:
        - /host/share:/home/foo/share
    ports:
        - "2222:22"
    command: foo:123:1001

Logging in

The OpenSSH server runs by default on port 22, and in this example, we are forwarding the container's port 22 to the host's port 2222. To log in with an OpenSSH client, run: sftp -P 2222 foo@<host-ip>

Multiple users and volumes

docker run \
    -v /host/share:/home/foo/share \
    -v /host/documents:/home/foo/documents \
    -v /host/http:/home/bar/http \
    -p 2222:22 -d atmoz/sftp \
    foo:123:1001 \
    bar:abc:1002

Encrypted password

Add :e behind password to mark it as encrypted. Use single quotes.

docker run \
    -v /host/share:/home/foo/share \
    -p 2222:22 -d atmoz/sftp \
    'foo:$1$0G2g0GSt$ewU0t6GXG15.0hWoOX8X9.:e:1001'

Tip: you can use makepasswd to generate encrypted passwords:
echo -n 123 | makepasswd --crypt-md5 --clearfrom -

Using SSH key (without password)

Mount all public keys in the user's .ssh/keys/ folder. All keys are automatically appended to .ssh/authorized_keys.

docker run \
    -v /host/id_rsa.pub:/home/foo/.ssh/keys/id_rsa.pub:ro \
    -v /host/id_other.pub:/home/foo/.ssh/keys/id_other.pub:ro \
    -v /host/share:/home/foo/share \
    -p 2222:22 -d atmoz/sftp \
    foo::1001

armbuild/sftp

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