Security Report Summary
A+
Site: https://www.checktls.nl/
IP Address: 85.10.148.195
Report Time: 09 Sep 2026 08:24:24 UTC
Headers:
  • Content-Security-Policy
  • Strict-Transport-Security
  • X-Frame-Options
  • X-Content-Type-Options
  • Referrer-Policy
  • Permissions-Policy
Advanced:
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Raw Headers
HTTP/2200
servernginx
dateWed, 09 Sep 2026 08:24:24 GMT
content-typetext/html; charset=UTF-8
cross-origin-embedder-policycredentialless
cross-origin-opener-policysame-origin
cross-origin-resource-policysame-origin
content-security-policydefault-src 'none'; script-src 'self' https://www.checktls.nl 'sha256-ieoeWczDHkReVBsRBqaal5AFMlBtNjMzgwKvLqi/tSU='; style-src https://cdnjs.cloudflare.com https://checktls.nl https://www.checktls.nl https://fonts.googleapis.com; img-src data: 'self' https://gadgets.buienradar.nl https://www.computerbas.nl; connect-src 'self'; font-src 'self' https://cdnjs.cloudflare.com https://fonts.gstatic.com; frame-src 'self' https://gadgets.buienradar.nl; frame-ancestors 'none'; object-src 'none'; child-src 'none'; media-src 'none'; manifest-src 'none'; base-uri 'none'; form-action 'self'; upgrade-insecure-requests;
strict-transport-securitymax-age=31536000; includeSubdomains; preload
x-frame-optionsDENY
x-content-type-optionsnosniff
referrer-policyno-referrer
cache-controlno-cache, no-store, must-revalidate
x-robots-tagall
alt-svch3=":443"; ma=86400
origin-agent-cluster?1
x-dns-prefetch-controlon
accept-chSec-CH-UA, Sec-CH-UA-Mobile, Sec-CH-UA-Platform
critical-chSec-CH-UA
x-powered-byComputerBas
x-aspnet-versionComputerBas
x-permitted-cross-domain-policiesnone
access-control-allow-originhttps://www.checktls.nl
access-control-allow-credentialstrue
access-control-allow-methodsGET, POST, OPTIONS
access-control-allow-headersOrigin, X-Requested-With, Content-Type, Accept, X-PINGOTHER
access-control-max-age3600
access-control-expose-headersContent-Length
set-cookie__Secure-sessionid=wwwchecktls;Path=/;Secure;HttpOnly;SameSite=Lax
permissions-policyaccelerometer=(), camera=(), geolocation=(), microphone=(), payment=(), usb=(), midi=(), fullscreen=(), autoplay=(), screen-wake-lock=(), gyroscope=(), magnetometer=()
Additional Information
serverThis Server header seems to advertise the software being run on the server but you can remove or change this value.
cross-origin-embedder-policyCross-Origin Embedder Policy allows a site to prevent assets being loaded that do not grant permission to load them via CORS or CORP.
cross-origin-opener-policyCross-Origin Opener Policy allows a site to opt-in to Cross-Origin Isolation in the browser.
cross-origin-resource-policyCross-Origin Resource Policy allows a resource owner to specify who can load the resource.
content-security-policyContent Security Policy is an effective measure to protect your site from XSS attacks. By whitelisting sources of approved content, you can prevent the browser from loading malicious assets. Analyse this policy in more detail. You can sign up for a free account on Report URI to collect reports about problems on your site.
strict-transport-securityHTTP Strict Transport Security is an excellent feature to support on your site and strengthens your implementation of TLS by getting the User Agent to enforce the use of HTTPS.
x-frame-optionsX-Frame-Options tells the browser whether you want to allow your site to be framed or not. By preventing a browser from framing your site you can defend against attacks like clickjacking.
x-content-type-optionsX-Content-Type-Options stops a browser from trying to MIME-sniff the content type and forces it to stick with the declared content-type. The only valid value for this header is "X-Content-Type-Options: nosniff".
referrer-policyReferrer Policy is a new header that allows a site to control how much information the browser includes with navigations away from a document and should be set by all sites.
x-powered-byX-Powered-By can usually be seen with values like "PHP/5.5.9-1ubuntu4.5" or "ASP.NET". Trying to minimise the amount of information you give out about your server is a good idea. This header seems to have been altered to remove such information, but could still be removed.
x-aspnet-versionX-AspNet-Version usually details specific information about your ASP.NET version. The value of this header seems to have been changed, but it could still be removed.
access-control-allow-originThe Access-Control-Allow-Origin header is used to configure CORS.
set-cookieThis cookie has the appropriate flags set.
permissions-policyPermissions Policy is a new header that allows a site to control which features and APIs can be used in the browser.