Ftplib ConnectionRefusedError: [Errno 111] 连接被拒绝 (python 3.5)

Question

I have a script that should connect to a FTP

from ftplib import FTP

with FTP('IP') as ftp:
   ftp.login(user='my user', passwd='my password')
   ftp.cwd('/MY_DIR')
   ftp.dir()

I have an error : ConnectionRefusedError: [Errno 111] Connection refused

---

The ftp is an EC2 with vsftpd

pasv_enable=YES
pasv_min_port=1024
pasv_max_port=1048
pasv_address=IP
pasv_addr_resolve=YES

Already tried :

The code work on other FTP with and without TLS (hosted on 1and1, OVH...)

---

I tried this script in NodeJS

const ftpClient = require('ftp-client');

const client = new ftpClient({
   host: "IP",
   port: 21,
   user: "My user", // defaults to "anonymous"
   password: "My password" // defaults to "@anonymous"
});

client.connect(() => {

  client.download('/MY_DIR/file','/tmp/file', (res) => {
        console.log(res)
  })
});

Works perfectly fine so I exclude a firewall problem

---

I have tried enable TLS

ssl_enable=YES
require_ssl_reuse=NO

then sudo service vsftpd restart

and use
FTP_TLS instead of FTP but did not work

---

Also I tried disable passive mode by setting

pasv_enable=NO

then sudo service vsftpd restart

and ftp.set_pasv(False)

didn't work either

Answer 1

Solution

After using filezilla to debug the method, turn out that our FTP returned 0.0.0.0 despite we defined in /etc/vsftpd.conf

pasv_adress=IP

this post helped us : https://www.centos.org/forums/viewtopic.php?t=52408

You have to comment

listen_ipv6=YES

and enable

listen=YES

in /etc/vsftpd.conf

---

Also you can override the ftplib's class FTP if you can't access to vsftpd.conf of the FTP

class CustomFTP(ftplib.FTP):

    def makepasv(self):
        if self.af == socket.AF_INET:
            host, port = ftplib.parse227(self.sendcmd('PASV'))
        else:
            host, port = ftplib.parse229(self.sendcmd('EPSV'), self.sock.getpeername())

        if '0.0.0.0' == host:
            """ this ip will be unroutable, we copy Filezilla and return the host instead """
            host = self.host
        return host, port

to force the previous host if '0.0.0.0' is send