When accessing Linux File Manager, the following error is displayed:
Invalid backend configuration. Readable volumes not available.
During the upgrade, the configuration files of ProFTPd as well as branding rewrite rules were changed.
Make sure the firewall is configured according to the guide. Note: The default range for passive port in
49152 65534. It should be either modified according to the Firewall Guide to
60000:65535, or firewall must enable connections to the ports
Make sure the
proftpdservice is running and listening the port
[root@web1 ~]# netstat -ntpl | grep ftp tcp 0 0 192.168.0.3:21 0.0.0.0:* LISTEN 19123/proftpd tcp 0 0 192.168.0.3:2021 0.0.0.0:* LISTEN 19123/proftpd