I'm trying to connect to a VPS running Windows Server 2019 using Filezilla Client, but get the error
GnuTLS error -110: The TLS connection was non-properly terminated.
My Let's Encrypt certificate is set for domains: www.example.com, example.com, ftp.example.com
My IIS configuration is set to use this certificate on both the global level (see screenshot 1) and on the FTP level (see screenshot 2).
Screenshot 1
Screenshot 2
My FileZilla settings (using Default transfer mode, but I tried Active and Passive too with the same error)
Resulting in this logging in FileZilla:
Status: Resolving address of www.example.com
Status: Connecting to 15.200.12.44:21...
Status: Connection established, waiting for welcome message...
Response: 220 Microsoft FTP Service
Command: AUTH TLS
Response: 234 AUTH command ok. Expecting TLS Negotiation.
Status: Initializing TLS...
Error: GnuTLS error -110: The TLS connection was non-properly terminated.
Status: Server did not properly shut down TLS connection
Status: Connection attempt failed with "ECONNABORTED - Connection aborted".
Error: Could not connect to server
Connecting without SSL
I tried to connect without SSL, so set FileZilla to Use explicit FTP over TLS if available.
And on my VPS I configured it to Allow SSL connections (and not require):
I then get the following notification but I AM able to connect:
My guess is it HAS to do with the certificate, but I don't know what. I Googled for the error, and tried some debugging like recommended here and here.
I also tried WinSCP, but still can't connect, so unlike some sites claim it's a FileZilla bug, I think I need to look for it on the server. But I'm lost on what to check now.
