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README.md

docker: sftpd 💾 🐳 🐙

Single-user OpenSSH server restricted to SFTP access

$ sudo docker run --name sftpd \
    -v ssh_host_keys:/etc/ssh/host_keys:rw \
    -v /somewhere:/data:rw \
    --tmpfs /home/nonroot/.ssh,size=16k \
    -p 2200:2200 \
    -e SSH_CLIENT_PUBLIC_KEYS="$(cat ~/.ssh/id_*.pub)" \
    --read-only --security-opt=no-new-privileges \
    --cap-drop=ALL --cap-add SETUID --cap-add SETGID --cap-add SYS_CHROOT \
    docker.io/fphammerle/sftpd

$ sshfs -p 2200 nonroot@localhost:/ /mount/point

sudo docker may be replaced with podman.

Pre-built docker images are available at https://hub.docker.com/r/fphammerle/sftpd/tags (mirror: https://quay.io/repository/fphammerle/sftpd?tab=tags)

Annotation of signed git tags docker/* contains docker image digests: https://github.com/fphammerle/docker-sftpd/tags

Detached signatures of images are available at https://github.com/fphammerle/container-image-sigstore (exluding automatically built latest tag).

Docker Compose 🐙

  1. git clone https://github.com/fphammerle/docker-sftpd
  2. Adapt public keys to SSH_CLIENT_PUBLIC_KEYS in docker-compose.yml
  3. docker-compose up --build