Security Report Summary
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Site: https://blog.getbootstrap.com/
IP Address: 104.20.26.6
Report Time: 09 Oct 2026 15:43:43 UTC
Headers:
  • Strict-Transport-Security
  • X-Content-Type-Options
  • Content-Security-Policy
  • X-Frame-Options
  • Referrer-Policy
  • Permissions-Policy
Advanced:
Your site could be at risk, let’s perform a deeper security analysis of your site and APIs:
Missing Headers
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.
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. Recommended value "X-Frame-Options: SAMEORIGIN".
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.
Permissions-PolicyPermissions Policy is a new header that allows a site to control which features and APIs can be used in the browser.
Raw Headers
HTTP/2200
dateFri, 09 Oct 2026 15:43:43 GMT
content-typetext/html; charset=utf-8
content-length8965
servercloudflare
last-modifiedFri, 09 Oct 2026 11:38:42 GMT
access-control-allow-origin*
etagW/"6ac8d242-994a"
expiresFri, 09 Oct 2026 15:13:27 GMT
cache-controlmax-age=600
content-encodinggzip
x-proxy-cacheREVALIDATED
x-github-request-id3E1A:2D4B6F:2DDC:61BB:6AC90BAA
x-github-edge-regionnortheurope
accept-rangesbytes
age0
via1.1 varnish
x-served-bycache-dub4368-DUB
x-cacheMISS
x-cache-hits0
x-timerS1791560623.120362,VS0,VE108
varyAccept-Encoding
x-fastly-request-id7c8bb612e59ab17f4e81ee8bf60f0cf4f9ff1eb7
cf-cache-statusDYNAMIC
strict-transport-securitymax-age=31536000; includeSubDomains; preload
x-content-type-optionsnosniff
cf-raya47e80a66de2c1d8-DUB
alt-svch3=":443"; ma=86400
Upcoming Headers
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.
Additional Information
serverServer value has been changed. Typically you will see values like "Microsoft-IIS/8.0" or "nginx 1.7.2".
access-control-allow-originThis is a very lax CORS policy. Such a policy should only be used on a public CDN.
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-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".