winscp.com scripting disconnect with FTP over TLS :: Support Forum

GwenDragon
Joined:: 2014-09-04
Posts:: 11
Location:: Germany

winscp.com scripting disconnect with FTP over TLS

2014-09-04 16:19

winscp.com and scripting for sync/backup a complete website over FTP and TLS stops after retrieving directory listing.

Using WinSCP 5.5.5 (Build 4605) on Windows 7 x64

The FTP-Server is a ProFTPd 1.3.5 on Linux x64 Debian 7.6

Some content of log/batch is anonymized by me!

Batch:

@echo off
setlocal
chcp 1252
 
set WINSCP=P:\WinSCP\winscp.com
set _BACKUPDIR=V:\BACKUP
%WinSCP% /log="%_BACKUPDIR%\winscp.log" /command "open u_ftp.WS1.de -explicittls" "synchronize local ""%_BACKUPDIR%\WS1\httpdocs\"" /httpdocs/" "exit" 
endlocal

Output from Batch:

Aktive Codepage: 1252.
Connecting to ftp****.de ...
Connected with ftp****.de, negotiating TLS connection...
TLS connection established. Waiting for welcome message...
Connected
Starting the session...
Reading remote directory...
Session started.
Active session: [1] u_ftp.WS1.de
Comparing...
Local 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME' <= Remote '/httpdocs/cgi-bin/lib/MIME'
Lost connection.
Disconnected from server
Could not retrieve directory listing
Error listing directory '/httpdocs/cgi-bin/lib/MIME'.
Session 'u_ftp.WS1.de' closed.
No session.

The snippet of WinSCP logfile:

. 2014-09-04 16:45:10.013 TLS connection established
. 2014-09-04 16:45:10.063 modify=20140904131256;perm=adfrw;size=1474;type=file;unique=902U2300D90;UNIX.group=1003;UNIX.mode=0644;UNIX.owner=10001; Fast.pm
. 2014-09-04 16:45:10.063 modify=20140904131256;perm=flcdmpe;type=cdir;unique=902U2300D8F;UNIX.group=1003;UNIX.mode=0755;UNIX.owner=10001; .
. 2014-09-04 16:45:10.063 modify=20140904131256;perm=flcdmpe;type=pdir;unique=902U2300D8D;UNIX.group=1003;UNIX.mode=0755;UNIX.owner=10001; ..
< 2014-09-04 16:45:10.118 226 Transfer complete
. 2014-09-04 16:45:10.118 Directory listing successful
. 2014-09-04 16:45:10.118 ..;D;0;1899-12-30T01:00:00.000Z;"" [0];"" [0];---------;0
. 2014-09-04 16:45:10.118 Fast.pm;-;1474;2014-09-04T13:12:56.000Z;"10001" [0];"1003" [0];rw-r--r--;0
. 2014-09-04 16:45:10.118 Remote file '/httpdocs/cgi-bin/lib/Class/Accessor/Chained/Fast.pm' [2014-09-04T13:12:56.000Z] [1474] is modified comparing to local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\Class\Accessor\Chained\Fast.pm' [2013-07-08T16:21:16.000Z] [1474]
. 2014-09-04 16:45:10.118 Remote file '/httpdocs/cgi-bin/lib/Class/Accessor/Faster.pm' [2014-09-04T13:12:56.000Z] [2473] is modified comparing to local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\Class\Accessor\Faster.pm' [2013-07-08T16:21:16.000Z] [2473]
. 2014-09-04 16:45:10.118 Remote file '/httpdocs/cgi-bin/lib/Class/Accessor.pm' [2014-09-04T13:12:56.000Z] [18240] is modified comparing to local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\Class\Accessor.pm' [2013-07-08T16:21:14.000Z] [18240]
. 2014-09-04 16:45:10.118 Collecting synchronization list for local directory 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME' and remote directory '/httpdocs/cgi-bin/lib/MIME', mode = Local, params = 0x2 (NoConfirmation)
. 2014-09-04 16:45:10.118 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\.' [2014-09-03T12:54:07.853Z] [0] excluded from synchronization
. 2014-09-04 16:45:10.118 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\..' [2014-09-03T12:54:07.853Z] [0] excluded from synchronization
. 2014-09-04 16:45:10.118 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Body.pm' [2013-07-08T16:21:24.000Z] [16665] included to synchronization
. 2014-09-04 16:45:10.118 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Decoder' [2014-09-03T12:54:06.436Z] [0] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Decoder.pm' [2013-07-08T16:21:24.000Z] [16112] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Entity.pm' [2013-07-08T16:21:26.000Z] [64456] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Field' [2014-09-03T12:53:47.546Z] [0] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Head.pm' [2013-07-08T16:21:27.000Z] [24929] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Lite.pm' [2013-07-08T16:21:29.000Z] [89378] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Parser' [2014-09-03T12:53:55.733Z] [0] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Parser.pm' [2013-07-08T16:21:31.000Z] [52595] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Tools.pm' [2013-07-08T16:21:32.000Z] [61550] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Type.pm' [2013-07-08T16:21:33.000Z] [2728] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Types.pm' [2013-07-08T16:21:34.000Z] [20752] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\WordDecoder.pm' [2013-07-08T16:21:34.000Z] [15273] included to synchronization
. 2014-09-04 16:45:10.123 Local file 'V:\BACKUP\WS1\httpdocs\cgi-bin\lib\MIME\Words.pm' [2013-07-08T16:21:35.000Z] [11276] included to synchronization
. 2014-09-04 16:45:10.123 Retrieving directory listing...
> 2014-09-04 16:45:10.123 CWD /httpdocs/cgi-bin/lib/MIME/
< 2014-09-04 16:45:10.173 250 CWD command successful
> 2014-09-04 16:45:10.173 PWD
< 2014-09-04 16:45:10.223 257 "/httpdocs/cgi-bin/lib/MIME" is the current directory
> 2014-09-04 16:45:10.223 TYPE A
. 2014-09-04 16:45:10.273 Disconnected from server
. 2014-09-04 16:45:10.273 Could not retrieve directory listing
< 2014-09-04 16:45:10.278 Script: Lost connection.
< 2014-09-04 16:45:10.278 Script: Disconnected from server
 
< 2014-09-04 16:45:10.278 Could not retrieve directory listing
 
< 2014-09-04 16:45:10.278 Error listing directory '/httpdocs/cgi-bin/lib/MIME'.

The problem exists with other FTPS accounts, too. And Wiscp.exe does stop too with problem of directory listing.

Downloading files with FTPS client FileZilla or GoLive CS2 works fine without any connection break.
Seems to be WinSCP related problem.

I can send you the complete log by mail.

How can I/we fix the problem?

PS: Thanks a lot for WinSCP! A good tool used for years now.

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,440
Location:: Prague, Czechia

Re: winscp.com scripting disconnect with FTP over TLS

2014-09-05

I have responded to your email.

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GwenDragon
Joined:: 2014-09-04
Posts:: 11
Location:: Germany

2014-09-05 16:25

Yes, I answered you by mail. I don't wanted to post internals of website to public and such log would be to big.

I looked into filezilla.log and saw some connection aborts. But FileZilla did reconnect and transferred all files with no error.

Seems winscp.com does not reconnect and does not try to resume the download/sync.

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martin◆ Site Admin
Joined:: 2002-12-10
Posts:: 41,440
Location:: Prague, Czechia

2014-09-08

GwenDragon wrote:

I looked into filezilla.log and saw some connection aborts. But filezilla did reconnect and transferred all files with no error.

WinSCP is currently able to automatically reconnect only when connection is lost while transferring a file, not when retrieving a directory listing.
This issue is tracked here:
Issue 25 – Automatic reconnect during any operation

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GwenDragon
Joined:: 2014-09-04
Posts:: 11
Location:: Germany

Solution: Disable StatefulFTP in Windows firewall

2014-09-08 09:45

Thanks for BT entries.
I browsed some entries and found a posting at https://winscp.net/forum/viewtopic.php?t=11568#41888 which helped to solve my problem!

Call as admin in cmd

netsh advfirewall set global StatefulFTP disable

helped on my Windows 7.

Now, no connection is broken with WinSCP and sync works in scripts.

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martin◆ Site Admin

Re: winscp.com scripting disconnect with FTP over TLS

2015-01-09

Refer to documentation for details on disabling stateful FTP filtering to overcome the FTP disconnects:
Disconnected from server

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eine
Joined:: 2014-12-12
Posts:: 8
Location:: Poland, Stettin

2015-06-11 02:43

Related to Windows 8.0 as well.

netsh advfirewall set global StatefulFTP disable

helps in W8 too.

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winscp.com scripting disconnect with FTP over TLS