Linux docker can be veeam repo

Prepare your NAS/Server: Install Docker, create a shared folder for the backups.

Create a ssh key pair, e.g. ssh-keygen -t rsa -C "your.email@example.com" -b 4096

Copy over the public key to your NAS/Server. Mount the public key to /root/.ssh/authorized_keys and a folder of your NAS to store your backups outside the container. Expose a port and map it to port 22.

docker run --rm babim/veeam-repo -p 2222:22 -p 2500-5000:2500-5000 \
    -v $PWD/veeam.pub:/root/.ssh/authorized_keys \
    -v /volume2/VeeamBackup:/veeam

SSHPASS = root (default password for user root)