ftp.ntua.gr:/debian/dists/stretch-backports/main/debian-installer/binary-amd64/by-hash/SHA256/?C=N&O=A 
Icon  Name                                                                        Last modified      Size  
[DIR] Parent Directory                                                                                 -   
[   ] ae2c45dedd5265a93040d6f2fa54dd05a85b30bf23ea797eef4e301d68010608            16-Oct-2020 17:00   11K  
[   ] cff89b67429815017c15f0cf43c09b4d71cb19534bf430658cf0b1b65ba41922            18-Jun-2017 11:28  177   
[   ] de3d1c70d991de8b89fa918be4b467d4be3cc692ea93fd85b1e7a58655d0b3d7            16-Oct-2020 17:00  9.8K
Apache/2.2 Server at debian.noc.ntua.gr Port 80