It was just a matter of changing file permissions of the key file found in ~/.ssh/ as follows: chmod 600 ~/.ssh/id_rsa In my case, the solution was very simple. After switching back to Linux Mint 18.3, the problem disappears. Using the same login credentials and SSH key on any new Ubuntu based Linux distribution caused the login error. It also happens on newer versions of Ubuntu, but not on the latest Linux Mint Debian. The following paragraphs describes how the problem happened to me.Īfter moving from Linux Mint 18.3 to Linux Mint 19.1, this error occurred when trying to SFTP into a remote server. Attempting to SSH from the command line gave the following error: sign_and_send_pubkey: signing failed: agent refused operation How the FileZilla SFTP Connection Error Occurred Further to this it was not possible to SSH into the server from the command line using the SSH key. SSH was set up in FileZilla using the following tutorial: Īfter changing Linux distribution versions (on the client side, not the server), FileZilla would no longer connect, but displayed the error messages instead. FileZilla SFTP Connection Error MessagesĪs can be seen in the image, two messages that appear are:Įrror: Pageant failed to answer challengeĮrror: Could not connect to server SSH Setup The image below shows the two messages that appear in FileZilla when trying to SFTP into a remote server. Download FileZilla Client.Error: Pageant failed to answer challenge Message in FileZilla It is available for Windows, Mac OS X, and Linux. What is FileZilla?įileZilla is a free, open source FTP client that supports FTP, SFTP, FTPS. The SSH Keys is more secure than password. SFTP provides two user-authentication options when connecting to your server: a)passwords or b)SSH2 key-based authentication. It adapts the Secure Shell (SSH) protocol with encryption and secure authentication on both server and client. SSH or Secure File Transfer Protocol (SFTP) is a secure file transfer protocol for file access, transfer, and management. Tip: You can use RunCloud File Manager in RunCloud panel for simple file management. You are recommended to use SFTP for file transfer instead. By default, RunCloud Firewall blocks FTP (port 21) at your server. Anyone is able to read the FTP usernames, passwords, commands and data by packet capture (sniffing) on the network. FTP (File Transfer Protocol) uses clear text for all transmissions.

Filezilla ssh sftp server permissions