Hmmmm...
FTP is standard [whole] database exchange protocol.
World-wide.
Like, if you have a data base in Maricopa County and you want to send it to, say Germany, the 2 servers would use FTP.
That exchange of DB would show on both routers with IP and MAC addresses.
Hacked you say?
“ FTP is standard [whole] database exchange protocol.
World-wide”
Welcome to 1999. FTP is all but gone for important things. SFTP, based on the SSH protocol has replaced it. Are you really still using FTP?