Angus, Thank you for your efforts to help me, I do appreciate it 🙂
Translation of FileZilla log is easy:
"ftpFixPasvLanIP" is switched ON.
The server is in a different LAN from the client and is accessible through real IP, which is mentioned in the log (same IP used for control channel as a result of ftpFixPasvLanIP=YES): "control channel: 46.163.***.***"
I'm not sure what more information I can provide, just let me know.