I can´t use the filezilla ftp-client. There is only the massage "Can´t read the folder"What´s the configuration for all functions of the ftp-client (all ports)
Which F-Secure software you are using ? If the F-Secure Firewall is on, please make sure Windows Firewall and other firewall is OFF.
If the issue still persist, can you try to turn off each of the component such as Virus and Spyware Scanning, DeepGuard, Firewall Application Control one by one too see which component is causing the issue?