ftp.ntua.gr:/debian/dists/stretch-backports/non-free/binary-arm64/by-hash/?C=N&O=A 
Icon  Name                                                   Last modified      Size  
[DIR] Parent Directory                                                            -   
[DIR] MD5Sum/                                                30-Mar-2020 12:18    -   
[DIR] SHA256/                                                30-Mar-2020 12:18    -
Apache/2.2 Server at debian.noc.ntua.gr Port 80