Opened 18 years ago

Last modified 16 years ago

#918 closed Bug report

Unreliability in connection and upload

Reported by: mschipperheyn Owned by:
Priority: normal Component: FileZilla Client
Keywords: Cc: mschipperheyn, funrider, Tim Kosse
Component version: Operating system type:
Operating system version:


When I upload files against an IIS Windows 2003 ftp-
server, Filezilla constantly has to reconnect. In a multi-
file upload, I get several critical errors and multiple retry
attempts. It constantly reports timeouts.

Large files especially suffer from this.

The absolute worst thing is that in some cases, a file
will be uploaded but in fact only part of the file will have
been placed on the server. This is absolutely killing,
since you have no way of knowing which file it was. You
get all sorts of corruption this way.

My settings:
FileZilla 2.2.14b
Enable keep alive system 15-30 seconds
zero byte transfer limit 15 seconds
attempt rety after 5 seconds up to 100 times.

I had to set 100 times otherwise it wouldn't be able to
complete large file uploads.

FileZilla seems a very unreliable ftp client to me.

Kind regards,


Change History (2)

comment:1 by funrider, 18 years ago

I've also got a problem with uploading larger (PDF files) 30+
mb files. It happens since the beginning I use Filezilla. I'm
now running version 2.2.16. I like the program but for larger
files I need to use another program that shouldnt be normal
ofcourse. It doesnt matter to which server I upload. It also
doesnt give a signal in the Process area that files didnt
upload completely. I heard afterworth from the person on the
other end of the FTP that some files were incomplete
uploaded. Please fix this problem asap. It's in there since a
long time now.

comment:2 by Tim Kosse, 16 years ago

Might be caused by this, try disabling the Application Layer Gateway:

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