ftp.ntua.gr:/debian/dists/stretch-backports/main/debian-installer/binary-all/by-hash/SHA256/ 
Icon  Name                                                                      Last modified      Size  
[DIR] Parent Directory                                                                               -   
[   ] 184e0df527c38cc52d3c04f6baf8d701803883cc5598d8421395fb924864b49b          11-Nov-2018 03:59  436   
[   ] 8bb5435129d5c553f2f89568ddb6a9c4224ca229a28ef5c0fb51ac0534e7b916          11-Nov-2018 03:59  369   
[   ] b0708fd246a6c3c8c48a26d93a66f690ecf7d4a69bb6156a5fa15e68e2a7a410          18-Jun-2017 11:28  175
Apache/2.2 Server at ftp.grnet.gr Port 80