ftp.ntua.gr:/debian/dists/stretch-updates/non-free/debian-installer/binary-amd64/by-hash/MD5Sum/?C=S&O=A 
Icon  Name                                                                          Last modified      Size  
[DIR] Parent Directory                                                                                   -   
[   ] 4a4dd3598707603b3f76a2378a4504aa                                              19-Jun-2017 23:59   20   
[   ] 8dc5aea5b03dff8595f096f9e368e888                                              18-Jun-2017 11:11   32   
[   ] d963e3478e42fb3a71bbf9f0e8c51205                                              18-Jun-2017 11:28   94
Apache/2.2 Server at debian.noc.ntua.gr Port 80