ftp.ntua.gr:/debian/dists/stretch-updates/contrib/debian-installer/binary-all/by-hash/?C=N&O=A 
Icon  Name                                                               Last modified      Size  
[DIR] Parent Directory                                                                        -   
[DIR] MD5Sum/                                                            19-Jun-2017 03:00    -   
[DIR] SHA256/                                                            19-Jun-2017 03:00    -
Apache/2.2 Server at debian.noc.ntua.gr Port 80