ftp.ntua.gr:/ubuntu/dists/xenial-security/main/signed/linux-amd64/current/?C=N&O=A 
Icon  Name                                             Last modified      Size  Description
[DIR] Parent Directory                                                      -   
[   ] SHA256SUMS                                       23-Apr-2021 11:03   80   
[   ] SHA256SUMS.gpg                                   23-Apr-2021 11:03  916   
[   ] signed.tar.gz                                    23-Apr-2021 11:03   27M
Apache/2.2 Server at ftp.ntua.gr Port 80