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That is normal behavior for Filezilla. &nbsp;It does not stay connected when it is not doing anything. &nbsp;It reconnects immediately when you access something again.
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That is normal behavior for Filezilla.  It does not stay connected when it is not doing anything.  It reconnects immediately when you access something again.

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FTP <b>MLSD</b> command out of nowhere. Seems odd, since no directory listing was requested.<br />
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First off, get out of FileZilla + debug this on the command line.<br />
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Try <b>sftp -vvv user@domain.tld</b> + my guess is this will surface detail you require to debug your connection.
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FTP MLSD command out of nowhere. Seems odd, since no directory listing was requested.

First off, get out of FileZilla + debug this on the command line.

Try sftp -vvv user@domain.tld + my guess is this will surface detail you require to debug your connection.

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I am running &nbsp;proFTPD server on &nbsp;my system. When i use filezilla ftp client i get the folllowing error when i try to access the files on my server. What is causing this error? See attached file for exact screenshot of the issue.<br />
<a href="https://filedb.experts-exchange.com/incoming/2017/07_w30/1184576/ftpd-error-message.PNG" target="_blank" class="file-inline" title="what is causing this issue? (108 KB)"><svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 512 512"><path d="M67.508 468.467c-58.005-58.013-58.016-151.92 0-209.943l225.011-225.04c44.643-44.645 117.279-44.645 161.92 0 44.743 44.749 44.753 117.186 0 161.944l-189.465 189.49c-31.41 31.413-82.518 31.412-113.926.001-31.479-31.482-31.49-82.453 0-113.944L311.51 110.491c4.687-4.687 12.286-4.687 16.972 0l16.967 16.971c4.685 4.686 4.685 12.283 0 16.969L184.983 304.917c-12.724 12.724-12.73 33.328 0 46.058 12.696 12.697 33.356 12.699 46.054-.001l189.465-189.489c25.987-25.989 25.994-68.06.001-94.056-25.931-25.934-68.119-25.932-94.049 0l-225.01 225.039c-39.249 39.252-39.258 102.795-.001 142.057 39.285 39.29 102.885 39.287 142.162-.028A739446.174 739446.174 0 0 1 439.497 238.49c4.686-4.687 12.282-4.684 16.969.004l16.967 16.971c4.685 4.686 4.689 12.279.004 16.965a755654.128 755654.128 0 0 0-195.881 195.996c-58.034 58.092-152.004 58.093-210.048.041z"/></svg>ftpd-error-message.PNG</a>
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ftpd-error-message.PNG

I am running  proFTPD server on  my system. When i use filezilla ftp client i get the folllowing error when i try to access the files on my server. What is causing this error? See attached file for exact screenshot of the issue.

ftp client error, what causes the login process to time out

The File Transfer Program (FTP) is a standard network protocol used to transfer computer files between a client and server on a computer network. Built on a client-server model architecture, it separates control and data connections between the client and the server. Users may access the server through a sign-in protocol, typically in the form of a username and password.

The Linux operating system, in all its flavors, has its own share of security flaws that allow intrusions, but there are various mechanisms by which these flaws can be removed, generally divided into two parts: authentication and access control. Authentication is responsible for ensuring that a user requesting access to the system is really the user with the account, while access control is responsible for controlling which resources each account has access to and what kind of access is permitted.