ftp.ntua.gr:/ubuntu/dists/xenial-backports/restricted/binary-amd64/by-hash/?C=N&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[DIR] SHA256/                                          19-Sep-2017 08:16    -
Apache/2.2 Server at ftp.ntua.gr Port 80