- Plesk for Linux
Unable to connect to a server through FTP in passive mode:
CONFIG_TEXT: Could not retrieve directory listing
Passive port are missing from the configuration files of FTP server:
# grep -ir "PassivePorts" /etc/
Module ip_conntrack_ftp is not loaded in the system:
# lsmod | grep conntrack_ftp
Passive ports are not configured on the server.
Configure passive ports using instruction from the article How to configure passive ports range for ProFTPd on a server behind a firewall?