vsftpd

vsftpd is a GPL licensed FTP server for UNIX systems, including Linux. It is secure and extremely fast. It is stable. Don't take my word for it, though.

docker-compose.yml

vsftpd:
  image: vimagick/vsftpd
  ports:
    - "21:21"
  volumes:
    - ./ftp:/var/lib/ftp
  privileged: true
  restart: always

Server

$ cd ~/fig/vsftpd/
$ docker-compose up -d
$ touch ./ftp/README.md
$ docker exec -it vsftpd_vsftpd_1 sh
>>>
>>> passwd root
Changing password for root
New password: ******
Retype password: ******
Password for root changed by root
>>>
>>> adduser kev
Changing password for kev
New password: ******
Retype password: ******
Password for kev changed by root
>>>
>>> exit

⚠️ Default password for root is empty, please change it! I also add another local user called kev here. You can edit /etc/vsftpd/vsftpd.conf to enable more functions.

Client

You can login as root/kev(local user) or ftp(anonymous user). Only local users can upload files.

$ ftp my-ftp-server
Connected to my-ftp-server.
220 Welcome to VSFTPD service.
Name (my-ftp-server:kev): ftp
331 Please specify the password.
Password: 
230 Login successful.
Remote system type is UNIX.
Using binary mode to transfer files.

ftp> epsv4 off
EPSV/EPRT on IPv4 off.

ftp> passive off
Passive mode: off; fallback to active mode: off.

ftp> verbose off
Verbose mode off.

ftp> ls
-rw-r--r--    1 0        0               0 Jan 31 15:06 README.md

ftp> get README.md
     0        0.00 KiB/s

ftp> !cat README.md

ftp> put README.md
Permission denied.

ftp> bye

⚠️ Passive mode is not working!