ftp.ntua.gr:/debian/dists/stretch-updates/non-free/debian-installer/binary-all/by-hash/MD5Sum/?C=N&O=D 
Icon  Name                                                                        Last modified      Size  
[DIR] Parent Directory                                                                                 -   
[   ] d1ca43089d91a3c4c59754c09b7c3a1c                                            18-Jun-2017 11:28   92   
[   ] 8dc5aea5b03dff8595f096f9e368e888                                            18-Jun-2017 11:11   32   
[   ] 4a4dd3598707603b3f76a2378a4504aa                                            19-Jun-2017 23:59   20
Apache/2.2 Server at debian.noc.ntua.gr Port 80