TLS encryption not working

[dwlamb]

I am having a problem with FileZilla and logging into my web host. In July, they implemented TLS encryption for log-in as mandatory. For some reason, the version of FileZilla installed on my system will no longer work despite having worked several times since the host implemented TLS encryption for log-in as mandatory.

Settings used:

host: xxxxx.com //x's only for security reasons on this post
port: 21
username: xxxxx
password: xxxxxxx
protocol: FTP
Encryption: Require explicit FTP over TLS

12:48:26 Status: Resolving address of xxxxx.com
12:48:26 Status: Connecting to xxx.xxx.xxx.xxx:21...
12:48:26 Status: Connection established, waiting for welcome message...
12:48:26 Response: 220---------- Welcome to Pure-FTPd [privsep] [TLS] ----------
12:48:26 Response: 220-You are user number 1 of 100 allowed.
12:48:26 Response: 220-Local time is now 12:48. Server port: 21.
12:48:26 Response: 220-This is a private system - No anonymous login
12:48:26 Response: 220-IPv6 connections are also welcome on this server.
12:48:26 Response: 220 You will be disconnected after 2 minutes of inactivity.
12:48:26 Command: AUTH TLS
12:48:26 Response: 234 AUTH TLS OK.
12:48:26 Status: Initializing TLS...
12:48:26 Error: GnuTLS error -12: A TLS fatal alert has been received.
12:48:26 Error: Could not connect to server
12:48:26 Status: Waiting to retry...

Researching the "GnuTLS error -12: A TLS fatal alert has been received." error message has not yielded a solution for this challenge. I have looked at FTP over TLS and tried prepending the host with 'ftpes://' which generates the same error message.

Looking at various posts on forums has led me to suspect a newer version of FileZilla is needed. The version presently on my system was installed through the MUON package manager for Kubuntu 14 over a year ago and is version 3.7.3. The version available for download is 3.35.2. That discrepancy leaves me scratching my head for usually a version installed from a repository is behind that of the most current available for download.

Installing version 3.35.2 on a Windows 7 virtual machine, I am able to connect to my web host. So, if the solution is to abandon version 3.7.3, how do I remove that version? Version 3.35.2 comes in a tar.bz file. How do I install it manually?

Or is there a solution for this error?

[botg]

Please post an unmodified log.

[dwlamb]

For obvious security reasons, I am not inclined to provide the domain name and IP address of my website. The only modified parts of the log cited in my original post are the domain name and IP address. Other than those two items, the log is unabridged.

[boco]

So, if the solution is to abandon version 3.7.3, how do I remove that version?

Simply remove the FileZilla package(s) through the Package Manager. Note that this package won't receive any support here, even if it was the latest, as it's a third-party redistribution.

Version 3.35.2 comes in a tar.bz file. How do I install it manually?

Just extract the contents into a user-writable directory (I use ~/Documents/filezilla3) and fire it up. Install any missing dependencies in case it will not run right away.

[dwlamb]

@boco: Thanks for the help. Upgrading resolved the problem