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So I'm pretty new to IIS and FTPS, tho I usually use ubuntu and vsftpd with sftp for secure file transfer. But in this case I was tasked with setting up a FTP server on a Windows server 2012 environment. Set up the user and FTP service and did a test transfer with WinSCP and FileZilla, so far so good.

But since some sensitive data will be transferred we needed encryption so I created a self signed certificate and set it to force encryption in SSL settings.

I tested the setup again and was able to log in. I could create directories and move files around. But when I tried to transfer files the transfer fails when the upload was finished with the message:

Using TLSv1.2, cipher TLSv1/SSLv3: ECDHE-RSA-AES256-SHA384, 2048 bit RSA, ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH     Au=RSA  Enc=AES(256)  Mac=SHA384 Copying files to remote side failed.

Looking in the logfile I could see one entry with the filename of the file I tested a transfer on:

STOR aircontrol-v2.0-beta20.1631.160317.1513-win64.exe 550 2148074264 0 202 73855447 4570 1d3abd73-5c55-48c8-a3b5-63b6ca868863 /aircontrol-v2.0-beta20.1631.160317.1513-win64.exe -

And that's all to it. I tried to do the same with FileZilla and got the same results.

Is there anyone who has an idea what to do?

Thanks in advance!

awesomefacepalm
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2 Answers2

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If you are using DFS (file replication) in the destination directory, that will give you TLS problems. Just erase DFS replication (not try to stop service, it will not work)

German Martin
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Try to vary TLS version settings:
https://forums.iis.net/t/1163993.aspx

Vadim
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