Censys search home page: https://censys.io/ipv4
Query hosts in 23.0.0.0/8 and 8.8.8.0/24
23.0.0.0/8 or 8.8.8.0/24
Query hosts in Germany that have opened Telnet and FTP
location.country_code: DE and protocols: ("23/telnet" or "21/ftp")
Query popular websites that do not have trusted certificates installed
not 443.https.tls.validation.browser_trusted: trueBecause this one is a website, we need to adjust the selection to website
Popular websites that use Apache and support HTTPS
80.http.get.headers.server: Apache and protocols: "443/https"
Trusted certificate for Github.com
github.com and tags: trustedNeed to adjust the search options to certificates
Censys official website use example: https://censys.io/ipv4/help/examples?q=&