ftp.ntua.gr:/debian/dists/stretch/main/installer-amd64/current/images/netboot/debian-installer/amd64/?C=N&O=D 
Icon  Name                                                                                Last modified      Size  
[DIR] Parent Directory                                                                                         -   
[DIR] pxelinux.cfg/                                                                       12-Jul-2020 20:49    -   
[   ] pxelinux.0                                                                          12-Jul-2020 20:49   41K  
[   ] linux                                                                               12-Jul-2020 20:49  4.1M  
[   ] initrd.gz                                                                           12-Jul-2020 20:49   24M  
[DIR] grub/                                                                               12-Jul-2020 20:49    -   
[   ] bootnetx64.efi                                                                      12-Jul-2020 20:49  436K  
[DIR] boot-screens/                                                                       12-Jul-2020 20:49    -
Apache/2.2 Server at debian.noc.ntua.gr Port 80