Security Report Summary
A
| Site: | https://linuxhandbook.com/ | ||
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| IP Address: | 104.26.15.101 | ||
| Report Time: | 27 Oct 2026 23:57:20 UTC | ||
| Headers: |
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| Advanced: |
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Missing Headers
| Permissions-Policy | Permissions Policy is a new header that allows a site to control which features and APIs can be used in the browser. |
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Raw Headers
| HTTP/2 | 200 |
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| date | Tue, 27 Oct 2026 23:57:20 GMT |
| content-type | text/html; charset=utf-8 |
| alt-svc | h3=":443"; ma=86400 |
| cache-control | private, max-age=0, must-revalidate, no-cache, no-store |
| report-to | {"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=16MHGdAavsvN9QB%2BCFkg%2B%2FA4CWBQYV4sHSwQ2lSefV60V2aYeJ%2BTQe8xSWL8QXc09syO%2BGWJVGIkR3fIwW2mdOEqB%2ByiX9JwwInUfNoD%2BHx8ttMkMS7D%2BTOW%2BvAr7L4SU1Ng%2Fg%3D%3D"}]} |
| content-security-policy | frame-ancestors 'self' |
| display | pub_site_sol |
| server-timing | cfCacheStatus;desc="DYNAMIC" |
| server-timing | cfEdge;dur=16,cfOrigin;dur=231 |
| expires | Mon, 26 Oct 2026 23:57:20 GMT |
| link | </llms.txt>; rel="llms-txt", </llms-full.txt>; rel="llms-full-txt" |
| referrer-policy | strict-origin-when-cross-origin |
| response | 200 |
| set-cookie | ezfs_630458=2899240757; Path=/; Domain=linuxhandbook.com; Expires=Wed, 28 Oct 2026 01:57:20 UTC |
| strict-transport-security | max-age=31536000; |
| vary | Accept-Encoding,User-Agent |
| via | 1.1 Caddy |
| x-content-type-options | nosniff |
| x-ezoic-cdn | Miss |
| x-ghost-analytics | true |
| x-llms-txt | /llms.txt |
| x-middleton-display | pub_site_sol |
| x-middleton-response | 200 |
| x-origin-cache-control | public, max-age=0 |
| x-powered-by | Express |
| x-sol | pub_site |
| x-xss-protection | 1; mode=block |
| cf-cache-status | DYNAMIC |
| nel | {"report_to":"cf-nel","success_fraction":0.0,"max_age":604800} |
| content-encoding | gzip |
| server | cloudflare |
| cf-ray | a515a47a9c47715a-DUB |
| X-Frame-Options | Header not set, see Additional Information below. |
Upcoming Headers
| Cross-Origin-Embedder-Policy | Cross-Origin Embedder Policy allows a site to prevent assets being loaded that do not grant permission to load them via CORS or CORP. |
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| Cross-Origin-Opener-Policy | Cross-Origin Opener Policy allows a site to opt-in to Cross-Origin Isolation in the browser. |
| Cross-Origin-Resource-Policy | Cross-Origin Resource Policy allows a resource owner to specify who can load the resource. |
Additional Information
| report-to | Report-To enables the Reporting API. This allows a website to collect reports from the browser about various errors that may occur. You can sign up for a free account on Report URI to collect these reports. |
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| content-security-policy | Content 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. |
| referrer-policy | Referrer 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. |
| strict-transport-security | HTTP 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-options | X-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". |
| x-powered-by | X-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 should be removed or the value changed. |
| x-xss-protection | X-XSS-Protection sets the configuration for the XSS Auditor built into older browsers. The recommended value was "X-XSS-Protection: 1; mode=block" but you should now look at Content Security Policy instead. |
| nel | Network Error Logging is a new header that instructs the browser to send reports during various network or application errors. You can sign up for a free account on Report URI to collect these reports. |
| server | Server value has been changed. Typically you will see values like "Microsoft-IIS/8.0" or "nginx 1.7.2". |
| X-Frame-Options | The XFO header was not sent but frame-ancestors in Content Security Policy was used instead. |