List of web server security scanners:
- ScanMyServer
- Nikto2 (https://cirt.net)
- Qualys FreeScan (https://www.qualys.com)
- Urlscan (https://www.iis.net)
Among the most popular there is ScanMyServer.
List of web server security scanners
ScanMyServer
https://scanmyserver.com/my_account/
Nikto2
https://cirt.net
Qualys FreeScan
https://www.qualys.com
Urlscan
https://www.iis.net