ido-slow-ftp-hosts

ido-slow-ftp-hosts is a variable defined in `ido.el'.
Its value is

nil

Documentation:
List of slow FTP hosts where Ido prompting should not be used.
If an FTP host is on this list, Ido automatically switches to the non-Ido
equivalent function, e.g. `find-file' rather than `ido-find-file'.

You can customize this variable.