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dependabot[bot] e5ea8c5b59 Bump docker/setup-buildx-action from 2.4.1 to 2.5.0 (#43)		1 anno fa
.github	e5ea8c5b59 Bump docker/setup-buildx-action from 2.4.1 to 2.5.0 (#43)	1 anno fa
CHANGELOG.md	02a35994a8 sshd: no longer accept RSA keys < 2048 bits for authentication	2 anni fa
Dockerfile	90e9369069 Bump alpine from 3.17.1 to 3.17.2 (#42)	1 anno fa
Makefile	64da870f82 single-user openssh ssh server restricted to sftp	3 anni fa
README.md	afc4bee9db added readme	3 anni fa
docker-compose.yml	64da870f82 single-user openssh ssh server restricted to sftp	3 anni fa
entrypoint.sh	64da870f82 single-user openssh ssh server restricted to sftp	3 anni fa
openssh-package-log.url	352f8cc9ce upgrade openssh packages from v9.0_p1-r2 to v9.1_p1-r1 (see below)	2 anni fa
openssh-release-notes.url	b8c194bb3b upgrade openssh server package v8.6_p1-r{2->3} (CVE-2021-41617)	3 anni fa
sshd_config	02a35994a8 sshd: no longer accept RSA keys < 2048 bits for authentication	2 anni fa

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 🐙

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

README.md

docker: sftpd 💾 🐳 🐙

Docker Compose 🐙