Unable to connect to a Plesk server via FTP in the passive mode

Dmitry Bystrov

1 year ago

Symptoms

It is not possible to connect to a Plesk server (or if connected, copy files) via FTP in the passive mode. One of the following error messages appears during connection (Error message varies depending on FTP client):

530 Login incorrect.
Login failed.

ftp: connect: Connection refused

Response: 227 Entering Passive Mode (203,0,113,111,250,241).
...
Error: Connection timed out after 20 seconds of inactivity
Error: Failed to retrieve directory listing

ftp: connect: Connection timed out

425 Can't open data connection.

An error occurred opening that folder on the FTP server. Make sure you have permission to access that folder. The operation timed out

Error listing directory '/httpdocs'. Transfer channel can't be opened. Reason: No connection could be made because the target machine actively refused it. Could not retrieve directory listing

Connecting data socket to (203.0.113.2) port 39383
Socket error (Connection timed out) - reconnecting
It is not possible to get a directory listing by FTP using Secured TLS: the connection establishes but directory listing does not work. The following errors appear in /var/log/secure:

pam_env(proftpd:setcred): Unable to open config file: /etc/security/pam_env.conf: Permission denied
pam_systemd(proftpd:session): Failed to connect to system bus: Permission denied
pam_listfile(proftpd:auth): Couldn't open /etc/ftpusers

The passive port range (by default, 49152-65535) is not properly configured.

Configure the passive port range:

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