Did long time research, everthimg seams ok but does not work, conf files in sites-availabel <code> <VirtualHost *:80> ServerName usv-pve-rh.muekno.de Redirect / https://172.16.1.70/ </VirtualHost> </code> <code> <VirtualHost *:443> ServerName usv-pve-rh.muekno.de DocumentRoot /var/www/html SSLEngine on SSLCertificateFile /etc/apache2/ssl/usv-pve-rh.muekno.de.pem SSLCertificateKeyFile /etc/apache2/ssl/usv-pve-rh.muekno.de.key ScriptAlias /cgi-bin/ /usr/lib/cgi-bin/ <Directory "/usr/lib/cgi-bin"> AllowOverride None Options +ExecCGI AddHandler cgi-script .cgi Require all granted </Directory> </VirtualHost> </code> index.html <code> <!DOCTYPE html> <html> <head> <title>Proxmox-USV</title> </head> <body> <h3>USV Status</h3> <br> <a href="/cgi-bin/apcupsd/multimon.cgi"> apcupsd MultiMon </a><br> <a href="/cgi-bin/apcupsd/upsstats.cgi"> apcupsd Stats </a><br> <a href="/cgi-bin/apcupsd/upsfstats.cgi"> apcupsd fStats </a><br><br><br> <h3>Proxmox Webinterface</h3><br> <a href="https://172.16.1.70:8006"> <!-- hier IP-Adresse anpassen! --> Proxmox Webinterface </a> </body> </html> </code> Every time I click an URL with cgi I got the Error from the subject. I out of any ideas Appreciate any help