ftp.ntua.gr:/debian/dists/stretch/main/installer-amd64/20170615+deb9u9/images/netboot/xen/?C=N&O=D 
Icon  Name                                                                       Last modified      Size  
[DIR] Parent Directory                                                                                -   
[   ] vmlinuz                                                                    12-Jul-2020 20:49  4.1M  
[   ] initrd.gz                                                                  12-Jul-2020 20:49   46M  
[TXT] debian.cfg                                                                 12-Jul-2020 20:49  6.1K
Apache/2.2 Server at ftp.grnet.gr Port 80