SOLVED FTP command LIST returns 425 Unable to build data connection

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Swift-R

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Mar 23, 2017
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I need to use FTPS so Plesk can backup into my NAS. Plesk does some checks before accepting the FTP connection and right now it's trying to run "LIST -a" and the server returns "425 Unable to build data connection: Connection refused". This occurs with both TLS on and off. I've tried this with FileZilla and I am able to fully manage the files, but when I send the command LIST it returns the same message.

Most of the solutions I've found was to enable Passive FTP, which it already is. Another solution in this forum also didn't work.

Also, is it possible to update ProFTPd to 1.3.5b (at least) from 1.3.5a? Fixed the MLSD CRLF warning message on the FTP tester.

Anyone?

Solved with: TLSRenegotiate none
 
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