ftp.ntua.gr:/debian/dists/stretch/main/installer-armhf/?C=M&O=D 
Icon  Name                        Last modified      Size  
[DIR] Parent Directory                                 -   
[DIR] current/                    12-Jul-2020 20:49    -   
[DIR] 20170615+deb9u9/            12-Jul-2020 20:49    -   
[DIR] 20170615/                   15-Jun-2017 11:34    -
Apache/2.2 Server at debian.noc.ntua.gr Port 80