Build a Simple FTP Server in 9 Python Lines with pyftpdlib

Today’s experiment demonstrates how to quickly set up an FTP server using only nine lines of Python code.

First, install the required third‑party library: pip3 install pyftpdlib Then write the script (shown below) and run it:

from pyftpdlib.authorizers import DummyAuthorizer
from pyftpdlib.handlers import FTPHandler
from pyftpdlib.servers import FTPServer

authorizer = DummyAuthorizer()
authorizer.add_user("ljds", "ljds", ".", perm="elradfmw")
handler = FTPHandler
handler.authorizer = authorizer
server = FTPServer(("192.168.1.102", 21), handler)
server.serve_forever()

The authorizer.add_user line creates an FTP login with username ljds , password ljds , the current directory (".") as the root, and a set of permissions (elradfmw). The permission table is illustrated below:

The server is bound to the local IP address 192.168.1.102 and the default FTP port 21: server = FTPServer(("192.168.1.102", 21), handler) After running the script, open a browser (or any FTP client) and navigate to ftp://192.168.1.102. After entering the correct username and password, the FTP directory listing appears as shown:

The author notes a confusion: using 127.0.0.1 (localhost) works on the same machine but not from other devices, while the actual LAN IP 192.168.1.102 works from both the host and remote computers. Adjusting the script to bind to the LAN IP resolves the issue.