I want to use FTP for backup and whenever i try to login FTP server it always shows cannot connect to FTP. I can login FTP server from command prompt and SSH. Anyone knows why?
So I don't know that 3CX is granular enough to tell a login failure from another error like if it tries to do a directory listing or checks permissions right after a login. I would turn up logging on your FTP to see what isn't working and maybe double check your permissions