If you see this page, then more than likely, you noticed a scan coming from auror-scanner.cesnet.cz:
Additionally, our HTTP-based scans use a Auror-specific user agent, which can be used to filter those requests: Mozilla/5.0 (compatible; Auror/1.1; +auror-scanner.cesnet.cz).
Auror is a tool for network security scanning. It scans hosts and gathers useful security-related information about available SSL/TLS, certificates, HTTP headers etc. All of the probes used in our tests are benign and do not contain exploit code. If you have any more questions please feel free to contact us at Contact.