I am using firewalld in public area and I have allowed access to the ftp service with the command:
firewall-cmd --permanent --zone=public --add-service=ftp
firewall-cmd –reload
I have told me that I put in listening port 20 I have tried as much as port service without results
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[xxxx@xxx ~]# nmap localhost
Starting Nmap 6.40 ( http://nmap.org ) at 2020-06-16 23:02 -04
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000015s latency).
Other addresses for localhost (not scanned): 127.0.0.1
Not shown: 983 closed ports
PORT STATE SERVICE
21/tcp open ftp
22/tcp open ssh
25/tcp open smtp
53/tcp open domain
80/tcp open http
110/tcp open pop3
111/tcp open rpcbind
143/tcp open imap
199/tcp open smux
443/tcp open https
465/tcp open smtps
587/tcp open submission
783/tcp open spamassassin
993/tcp open imaps
995/tcp open pop3s
3306/tcp open mysql
10000/tcp open snet-sensor-mgmt
Nmap done: 1 IP address (1 host up) scanned in 1.62 seconds
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. 2020-06-16 01:10:16.253 --------------------------------------------------------------------------
. 2020-06-16 01:10:16.254 WinSCP Version 5.13.3 (Build 8565) (OS 10.0.18363 - Windows 10 Enterprise)
. 2020-06-16 01:10:16.254 Configuration: HKCU\Software\Martin Prikryl\WinSCP 2\
. 2020-06-16 01:10:16.254 Log level: Normal
. 2020-06-16 01:10:16.254 Local account: xxxxxxx\xxxxxxx
. 2020-06-16 01:10:16.254 Working directory: C:\Program Files (x86)\WinSCP
. 2020-06-16 01:10:16.254 Process ID: 6440
. 2020-06-16 01:10:16.255 Command-line: "C:\Program Files (x86)\WinSCP\WinSCP.exe"
. 2020-06-16 01:10:16.255 Time zone: Current: GMT-4, Standard: GMT-4 (Hora est. Sudamérica Pacífico), DST: GMT-3 (Hora verano Sudamérica Pacífico), DST Start: 05-09-2020, DST End: 04-04-2020
. 2020-06-16 01:10:16.255 Login time: martes, 16 de junio de 2020 1:10:16
. 2020-06-16 01:10:16.256 --------------------------------------------------------------------------
. 2020-06-16 01:10:16.256 Session name: xxxxxxxxx@xxxxxx (Site)
. 2020-06-16 01:10:16.256 Host name: xxx.xxx.xxx.xxx (Port: 21)
. 2020-06-16 01:10:16.256 User name: xxxxxxx (Password: Yes, Key file: No, Passphrase: No)
. 2020-06-16 01:10:16.256 Transfer Protocol: FTP
. 2020-06-16 01:10:16.256 Ping type: Dummy, Ping interval: 30 sec; Timeout: 15 sec
. 2020-06-16 01:10:16.256 Disable Nagle: No
. 2020-06-16 01:10:16.256 Proxy: None
. 2020-06-16 01:10:16.256 Send buffer: 262144
. 2020-06-16 01:10:16.256 UTF: Auto
. 2020-06-16 01:10:16.256 FTPS: None [Client certificate: No]
. 2020-06-16 01:10:16.256 FTP: Passive: Yes [Force IP: Auto]; MLSD: Auto [List all: Auto]; HOST: Auto
. 2020-06-16 01:10:16.256 Local directory: default, Remote directory: home, Update: Yes, Cache: Yes
. 2020-06-16 01:10:16.256 Cache directory changes: Yes, Permanent: Yes
. 2020-06-16 01:10:16.256 Recycle bin: Delete to: No, Overwritten to: No, Bin path:
. 2020-06-16 01:10:16.256 Timezone offset: 0h 0m
. 2020-06-16 01:10:16.256 --------------------------------------------------------------------------
. 2020-06-16 01:10:16.294 Connecting to xxx.xxx.xxx.xxx ...
. 2020-06-16 01:10:16.294 Connected with xxx.xxx.xxx.xxx. Waiting for welcome message...
< 2020-06-16 01:10:16.296 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
< 2020-06-16 01:10:16.296 220-You are user number 1 of 100 allowed.
< 2020-06-16 01:10:16.296 220-Local time is now 01:10. Server port: 21.
< 2020-06-16 01:10:16.296 220-This is a private system - No anonymous login
< 2020-06-16 01:10:16.296 220-IPv6 connections are also welcome on this server.
< 2020-06-16 01:10:16.297 220 You will be disconnected after 20 minutes of inactivity.
> 2020-06-16 01:10:16.297 USER xxxxxxxxxx
< 2020-06-16 01:10:16.312 331 User xxxxxxxxxxx OK. Password required
> 2020-06-16 01:10:16.312 PASS **************
< 2020-06-16 01:10:16.362 230 OK. Current restricted directory is /
> 2020-06-16 01:10:16.363 SYST
< 2020-06-16 01:10:16.377 215 UNIX Type: L8
> 2020-06-16 01:10:16.377 FEAT
< 2020-06-16 01:10:16.394 211-Extensions supported:
< 2020-06-16 01:10:16.394 EPRT
< 2020-06-16 01:10:16.394 IDLE
< 2020-06-16 01:10:16.394 MDTM
< 2020-06-16 01:10:16.394 SIZE
< 2020-06-16 01:10:16.394 MFMT
< 2020-06-16 01:10:16.394 REST STREAM
< 2020-06-16 01:10:16.394 MLST type*;size*;sizd*;modify*;UNIX.mode*;UNIX.uid*;UNIX.gid*;unique*;
< 2020-06-16 01:10:16.394 MLSD
< 2020-06-16 01:10:16.394 AUTH TLS
< 2020-06-16 01:10:16.394 PBSZ
< 2020-06-16 01:10:16.394 PROT
< 2020-06-16 01:10:16.394 UTF8
< 2020-06-16 01:10:16.394 TVFS
< 2020-06-16 01:10:16.394 ESTA
< 2020-06-16 01:10:16.394 PASV
< 2020-06-16 01:10:16.394 EPSV
< 2020-06-16 01:10:16.394 SPSV
< 2020-06-16 01:10:16.395 211 End.
> 2020-06-16 01:10:16.395 OPTS UTF8 ON
< 2020-06-16 01:10:16.416 200 OK, UTF-8 enabled
. 2020-06-16 01:10:16.465 Connected
. 2020-06-16 01:10:16.465 --------------------------------------------------------------------------
. 2020-06-16 01:10:16.465 Using FTP protocol.
. 2020-06-16 01:10:16.465 Doing startup conversation with host.
> 2020-06-16 01:10:16.480 PWD
< 2020-06-16 01:10:16.494 257 "/" is your current location
. 2020-06-16 01:10:16.494 Getting current directory name.
. 2020-06-16 01:10:16.536 Retrieving directory listing...
> 2020-06-16 01:10:16.536 TYPE A
< 2020-06-16 01:10:16.551 200 TYPE is now ASCII
> 2020-06-16 01:10:16.551 PASV
. 2020-06-16 01:10:31.254 Timeout detected. (control connection)
. 2020-06-16 01:10:31.254 Could not retrieve directory listing
* 2020-06-16 01:10:31.319 (EFatal) **Lost connection.**
* 2020-06-16 01:10:31.319 Timeout detected. (control connection)
* 2020-06-16 01:10:31.319 Could not retrieve directory listing
* 2020-06-16 01:10:31.319 Error listing directory '/'.
I would appreciate if you could give me an idea of what might be happening because I have verified that the ftp service is listening from the internet, so I rule out the firewall problem
