Hi, I have run into problems when following the tutorial and configuring a FTPS server like this:
server = FTPServer(('', 21), handler)
IIRC the short version '' worked for FTP but not for FTPS. It seems to not get resolved. I had to specifically write:
server = FTPServer(('0.0.0.0', 21), handler)
I think you should make the loopback explicit 0.0.0.0 in the tutorial for FTPS or at least mention it there.