ftp.ntua.gr:/debian/dists/stretch-backports/non-free/binary-amd64/by-hash/SHA256/?C=S&O=A 
Icon  Name                                                             Last modified      Size  
[DIR] Parent Directory                                                                      -   
[   ] 5fc41aadcbb60d686a860226a5162dbe56ff9e283325a68d5d676dccc7135251 18-Jun-2017 11:28  181   
[   ] e356adcf94ba39f9d77c45f04c4ecd135b35074840461eb84a7158d423e2e90c 13-Jul-2020 16:57   32K  
[   ] 9b2fd972f454040ec5de5d3260993490d5328e768fabf1da3f22ffc119cddb24 13-Jul-2020 16:57   39K
Apache/2.2 Server at debian.noc.ntua.gr Port 80