ftp.ntua.gr:/debian/dists/stretch-updates/non-free/source/by-hash/SHA256/?C=S&O=D 
Icon  Name                                                             Last modified      Size  
[DIR] Parent Directory                                                                      -   
[   ] 8fdf1097ff6bf38afdcb5624a128604694d1d696ab5730de9aa7e53809c8ec50 18-Jun-2017 11:28   95   
[   ] 0040f94d11d0039505328a90b2ff48968db873e9e7967307631bf40ef5679275 13-Apr-2021 22:57   32   
[   ] f61f27bd17de546264aa58f40f3aafaac7021e0ef69c17f6b1b4cd7664a037ec 13-Apr-2021 22:57   20
Apache/2.2 Server at debian.noc.ntua.gr Port 80