I've tried to connect with various ways to my FTP, but without any luck. As currently, I tried to use your FTP configuration file and follow the instructions, but here's what I'm getting in the console of FileZilla:
Status: Resolving address of ftp.letitbe.heliohost.org
Status: Connecting to 64.62.211.131:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Connected
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is your current location
Command: TYPE I
Response: 200 TYPE is now 8-bit binary
Command: PASV
Response: 227 Entering Passive Mode (64,62,211,131,211,243)
Command: MLSD
Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing
Status: Disconnected from server
Status: Resolving address of ftp.letitbe.heliohost.org
Status: Connecting to 64.62.211.131:21...
Status: Connection established, waiting for welcome message...
Status: Initializing TLS...
Status: Verifying certificate...
Status: TLS connection established.
Status: Connected
Status: Retrieving directory listing...
Command: PWD
Response: 257 "/" is your current location
Command: TYPE I
Response: 200 TYPE is now 8-bit binary
Command: PASV
Response: 227 Entering Passive Mode (64,62,211,131,229,237)
Command: MLSD
Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing
Am I missing here something? Ok, so I dived into the setting a little bit and tried the insecure connection with plain FTP and it worked. But, however, I'm still not getting it why am I not able to connect with FTP over TLS if available (or even SSH, perhaps)