About Error: GnuTLS error -110

[maru]

Hello.

I am a beginner.
Please forgive my lack of study.

This time, I have question about FileZilla Client Error.

When connecting to a FileZilla Server (ver1.3.0) under the NAT router from FileZilla Client (ver3.59.0) (WAN side) of an external company,
the following error was displayed on the FileZilla client.

Error: GnuTLS error -110: The TLS connection was non properly terminated.
Status: Server did not properly shut down TLS connection
Could not connect to server

Information other than the above has not been obtained yet.
I'm sorry, I haven't got the log yet.

What is the cause of the above?
By the way, when I checked on the following site, there was a compatibility problem because I set to reject the connection from IPv6 with FileZilla Server's settings, but other than that, it was All OK.

https://ftptest.net/

By the way , I can connect to that server from my home (WAN side) without any problems.

Is there a possibility of cause that that company uses internet with IPv6 environment?
Also, is there a possibility of cause that the existence of Proxy etc.
Also, Had I better enable Proxy Ignore setting with the FileZilla Client and test it?

Please give me advice.

[botg]

Please post a complete log.

[maru]

Thank you for reply.
Thank you , Mr.Kosse.

I will let you know when the log can be obtained.

[maru]

I'm sorry, Mr.Kosse.
I have a question about logging.
When getting the error log, is it okay for the logging level to be "Normal" like an attachment?

[botg]

Normal is fine.

[maru]

Thank you for reply.
Thank you , Mr.Kosse.
I will continue to test.

[michuszy]

Have you been able to solve this problem? I have exactly the same one and if you know the solution, could you please share it with me? Kind regards

[botg]

Please post a complete log.

[michuszy]

filezilla-server.log

(156.31 KiB) Downloaded 84 times

[michuszy]

Thank you for your interest and please help if you can

[botg]

Are you behind a NAT router? If so, you need to configure both the server and the NAT router as explained in our Network Configuration guide.

[michuszy]

Thank you for the link you provided. Thanks to him I learned how it all works. I managed to establish a data-connection in passive mode with my server located behind NAT. I set the port range and added the appropriate forwarding in my router's NAT service (ports: 21 and range, in my case 5000 - 6000 redirected to the local address of the server). It works, thanks for the hint