Hello, I spend many hours researching and testing before posting this request. I have ISPconfig 3.1.x installed using: https://www.howtoforge.com/tutorial/perfect-server-ubuntu-with-nginx-and-ispconfig-3/ The Perfect Server - Ubuntu 15.10 (nginx, MySQL, PHP, Postfix, BIND, Dovecot, Pure-FTPD and ISPConfig 3). But my server is Ubuntu 14.x. Using Filezilla (latest version on Windows 10), disabled firewall. On my ISPconfig, setup the passive ports (firewall & pure-ftp) per your instructions found elsewhere. I do want an encrypted FTP connection. Tested at https://ftptest.net with the following output: Status: Resolving address of ***.***.com Status: Connecting to 209.**.**.** Warning: The entered address does not resolve to an IPv6 address. Status: Connected, waiting for welcome message... Reply: 220---------- Welcome to Pure-FTPd [privsep] [TLS] ---------- Reply: 220-You are user number 1 of 50 allowed. Reply: 220-Local time is now 01:23. Server port: 21. Reply: 220-This is a private system - No anonymous login Reply: 220-IPv6 connections are also welcome on this server. Reply: 220 You will be disconnected after 15 minutes of inactivity. Command: CLNT https://ftptest.net on behalf of 50.**.**.** Reply: 530 You aren't logged in Command: AUTH TLS Reply: 234 AUTH TLS OK. Status: Performing TLS handshake... Status: TLS handshake successful, verifying certificate... Status: Received 1 certificates from server. *** cert info deleted *** Command: USER username* Reply: 331 User username* OK. Password required Command: PASS **************** Error: Connection timed outI am using a correct password. It includes the prefix. I tried with several accounts with FTP client settings: port: 21, Protocol: Explicit FTP over TLS, both passive and default settings in FileZilla. I also tried on two different networks, 2nd network with no hardware (router/modem) was on my cellular connected laptop. Your expertise and advice would be very much appreciated to resolve this FTP connection problem. Thank you.