ftp.ntua.gr:/debian/dists/stretch/main/installer-armhf/20170615/images/netboot/?C=M&O=A 
Icon  Name                                                        Last modified      Size  
[DIR] Parent Directory                                                                 -   
[   ] boot.scr                                                    15-Jun-2017 11:34  1.5K  
[   ] initrd.gz                                                   15-Jun-2017 11:34   20M  
[   ] netboot.tar.gz                                              15-Jun-2017 11:34   26M  
[   ] tftpboot.scr                                                15-Jun-2017 11:34  796   
[   ] vmlinuz                                                     15-Jun-2017 11:34  3.5M  
[DIR] SD-card-images/                                             15-Jun-2017 23:55    -   
[DIR] gtk/                                                        15-Jun-2017 23:55    -
Apache/2.2 Server at ftp.grnet.gr Port 80