ftp.ntua.gr:/debian/dists/stretch-updates/non-free/debian-installer/binary-arm64/by-hash/SHA256/?C=S&O=A 
Icon  Name                                                                          Last modified      Size  
[DIR] Parent Directory                                                                                   -   
[   ] f61f27bd17de546264aa58f40f3aafaac7021e0ef69c17f6b1b4cd7664a037ec              19-Jun-2017 23:59   20   
[   ] 0040f94d11d0039505328a90b2ff48968db873e9e7967307631bf40ef5679275              18-Jun-2017 11:11   32   
[   ] 469570cacc4214982fa12f54d303ebf790e3c36ef67438ceddaa0b4c2f990a1a              18-Jun-2017 11:28   94
Apache/2.2 Server at debian.noc.ntua.gr Port 80