you could also try to fire Filezilla from cli with verbos turned up and piped to a log file locally. May uncover a clue. Since you are connecting via ssh you might try cli sftp connection as well to help isolate program issue or system issue.
-- Fred On Thu, Jun 1, 2017 at 6:13 PM, Peter Flynn <[email protected]> wrote: > On 06/01/2017 09:27 PM, Rog wrote: > > I rely on Filezilla to transfer files to my hosting service but it no > > longer works. It fails at the very beginning, failing to connect. Much > > searching w/ Google turns up no answers. Nor does a tech support > > consultation with the hosting service. The failure is NOT due to wrong > > username or password as I can establish ssh connections from the CLI. > > It's worrying when this happens, but hosting services are notorious for > changing things which don't affect Mac or Windows users, but which may > affect Linux users. > > From what you quote below it looks like it's having trouble identifying > which key exchange (kex) algorithm to use: the server wants you to use > diffie-hellman-group-exchange-sha256 but Konqueror can only use one of > [email protected] > ecdh-sha2-nistp256 > diffie-hellman-group14-sha1 > diffie-hellman-group1-sha1 > This post https://ubuntuforums.org/showthread.php?t=2297006 (different > circumstances and different software) explains how to find out what > algorithms are supported, but it's a couple of years old. > > At a wild random guess the hosting company has changed things so that > they only support diffie-hellman-group-exchange-sha256, so you'll need > an sftp client that supports that method of key exchange. Obviously > FileZilla doesn't. > > Can you try again and note the EXACT date and time, then call tech > support and ask them to check the access logs (eg /var/log/secure) to > find out if they can see a request coming in from your IP address, and > being rejected. > > If you search Mr Google for > filezilla diffie-hellman-group-exchange-sha256 > you will gets lots of pages about this problem, so it seems to be well > known. Several posts make the suggestion along the lines of: > > > FileZilla's SFTP support is based on PuTTY's psftp. If you change the > > default key exchange cipher priorities in PuTTY, it should also > > affect FileZilla. > > but this may only apply to Windows clients. I'm afraid I don't have a > solution (and I just hope my own hosting provider doesn't make the same > move, although I only use FZ very rarely, as sftp from the command line > is fine for my own use). > > ///Peter > > > > Konqueror also fails to connect and gives the following, more detailed > > error: > > > > The requested operation could not be completed > > > > Details of the Request: > > URL: sftp:// [redacted] > > Protocol: sftp > > Date and Time: Thursday, June 01, 2017 04:18 PM > > Additional Information: kex error : no match for method kex algos: > > server [diffie-hellman-group-exchange-sha256], client > > [[email protected],ecdh-sha2-nistp256,diffie- > hellman-group14-sha1,diffie-hellman-group1-sha1] > > Description: > > kex error : no match for method kex algos: server > > [diffie-hellman-group-exchange-sha256], client > > [[email protected],ecdh-sha2-nistp256,diffie- > hellman-group14-sha1,diffie-hellman-group1-sha1] > > > > I note that I've gone so far as deleting all Filezilla-related files and > > re-installing it as well as deleting my known hosts file, to no avail. > > So I turn to this list in desperation. I would really like to continue > > to use Filezilla because it's fast and easy. > > > > -- > > Roger > > [email protected] > > > > > > > > -- > xubuntu-users mailing list > [email protected] > Modify settings or unsubscribe at: https://lists.ubuntu.com/ > mailman/listinfo/xubuntu-users >
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