ftp.ntua.gr:/debian/dists/buster-backports/non-free/debian-installer/binary-all/by-hash/SHA256/?C=M&O=A 
Icon  Name                                                                         Last modified      Size  
[DIR] Parent Directory                                                                                  -   
[   ] 0040f94d11d0039505328a90b2ff48968db873e9e7967307631bf40ef5679275             14-Jul-2019 10:58   32   
[   ] ab12d5fb55bbb68a88c5b804ea070eeed7f3e0aca5a744852589cdaece5af11b             14-Jul-2019 11:26  178
Apache/2.2 Server at debian.noc.ntua.gr Port 80