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I have one server, Linux based, I use for some years like a backup cloud server. This work very well with client like Windows 7, Ubuntu and Android. But Not with Windows 10.
All programs I'ave used for connection work well without problem from years with this clients.
Now I would like connect another computer for online backup with SyncBackFree or freefilesync on windows 10 operative system and I'ave problem with FTP connection.
To do a test I also tried the ftp connection with filezilla and even here with win 10 I find the same problem.

The program I use like server FTP is vsftpd, but I'ave try also ProFTPD with the same problem.

Here some test:

server FTP on linux system ProFTPD (with vsftpd is very similar result)

----------------Test connection 1:
client SyncBackFree on Windows 10 32bit

13/01/2019 03:48:33: SyncBackFree V8.5.97.0  
13/01/2019 03:48:33: Windows 10 build 17134  
13/01/2019 03:48:33: Resolving host name "82.**.**.**"  
13/01/2019 03:48:33: Connecting to 82.**.**.** Port: 25  
13/01/2019 03:48:33: Connected to 82.**.**.**.    
13/01/2019 03:48:34: 220 ProFTPD 1.3.5a Server (MaxServerFtp) [192.168.1.8]  
13/01/2019 03:48:34: USER odroid  
13/01/2019 03:48:34: 331 Password required for odroid  
13/01/2019 03:48:34: PASS (hidden)  
13/01/2019 03:48:35: 230 User odroid logged in  
13/01/2019 03:48:35: SYST  
13/01/2019 03:48:35: 215 UNIX Type: L8  
13/01/2019 03:48:35: Detected Server Type: UNIX  
13/01/2019 03:48:35: RTT: 26.404 ms 
13/01/2019 03:48:35: FEAT  
13/01/2019 03:48:35: 211-Features:  
13/01/2019 03:48:35: SITE MKDIR  
13/01/2019 03:49:36: Timeout (60s).  
13/01/2019 03:49:36: 3  
13/01/2019 03:49:36: Client closed the connection. 

---------------Test connection 2:
freefilesync on Windows 10 32bit

CURLE_OPERATION_TIMEDOUT: server response timeout  
SITE MKDIR [curl_easy_perform]  

---------------Test connection 3:
filezilla client on Windows 10 32bit

Stato:  Connessione a 82.**.**.**:25...  
Stato:  Connessione stabilita, in attesa del messaggio di benvenuto...  
Stato:  Server non sicuro, non supporta FTP su TLS.  
Comando:    USER odroid  
Risposta:   331 Password required for odroid  
Comando:    PASS **************  
Risposta:   230 User odroid logged in  
Comando:    SYST  
Risposta:   215 UNIX Type: L8  
Comando:    FEAT  
Risposta:   211-Features:  
Risposta:    SITE MKDIR  
Errore: Timeout connessione dopo 20 secondi di inattività  
Errore: Impossibile collegarsi al server  
Stato:  In attesa di un nuovo tentativo...  
Stato:  Connessione a 82.**.**.**:25...  
Stato:  Connessione stabilita, in attesa del messaggio di benvenuto...  
Risposta:   220 ProFTPD 1.3.5a Server (MaxServerFtp) [192.168.1.8]  
Comando:    AUTH TLS  
Risposta:   500 AUTH not understood  
Comando:    AUTH SSL  
Risposta:   500 AUTH not understood  
Stato:  Server non sicuro, non supporta FTP su TLS.  
Comando:    USER odroid  
Risposta:   331 Password required for odroid  
Comando:    PASS **************  
Risposta:   230 User odroid logged in  
Comando:    FEAT  
Risposta:   211-Features:  
Risposta:    SITE MKDIR  
Errore: Tentativo di connessione interrotto dall'utente  

Here log example of connection successful from client win7 to server ProFTPD linux:

Connecting to 82.**.**.**, Port 25  
220 ProFTPD 1.3.5a Server (MaxServerFtp) [192.168.1.8]  
USER odroid  
331 Password required for odroid  
PASS (hidden)  
230 User odroid logged in  
FEAT  
211-Features:  
 SITE MKDIR  
 MFF modify;UNIX.group;UNIX.mode;  
 REST STREAM  
 MLST   modify*;perm*;size*;type*;unique*;UNIX.group*;UNIX.mode*;UNIX.owner*;  
 UTF8  
 EPRT  
 SITE SYMLINK  
 EPSV  
 SITE UTIME  
 LANG it-IT.UTF-8;it-IT;en-US.UTF-8;en-US*  
 MDTM  
 SITE RMDIR  
 TVFS  
 SITE COPY  
 MFMT  
 SIZE  
211 End    
OPTS UTF8 ON  
200 UTF8 set to on  
REST 0  
350 Restarting at 0. Send STORE or RETRIEVE to initiate transfer  
PWD  
257 "/home/odroid" is the current directory  
CWD /var/www/test/htdocs  
250 CWD command successful  
TYPE A  
200 Type set to A  
PASV  
227 Entering Passive Mode (82.**.**.**,156,201).  
MLSD  
150 Opening ASCII mode data connection for MLSD  
226 Transfer complete  

Can someone help me? Any help would be highly appreciated.

Davide

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