ftp.ntua.gr:/debian/dists/stretch-updates/non-free/debian-installer/binary-armel/by-hash/?C=S&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