install

docker run -it -p 8000:80 -p 8001:21 -p 8002:22 -p 8003:443 -v /home/sftp:/root --name sftp debian /bin/bash
apt install ssh -y
/etc/init.d/ssh start 
passwd

config

nano /etc/ssh/sshd_config
``` shell

``` config
PermitRootLogin yes
ChallengeResponseAuthentication yes

/etc/init.d/ssh restart

test

 sftp -P 8002 root@x.x.x.x