DNS Gurus
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16 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Missing
Not configured
Content-Security-Policy
Basic
default-src
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Improve CSP by adding more specific directives and removing 'unsafe-inline'
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

2 headers
Connection
Performance
close
Vary
Performance
Accept-Encoding

Caching Headers

1 headers
Etag
Caching
W/"d526-ziPUcC3F1854CZ0Kw//ORN6Qz80"

Content Headers

2 headers
Content-Length
Content
54566
Content-Type
Content
text/html; charset=utf-8

Server Headers

1 headers
Server
Server
Heroku

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
lang=en; Path=/

Other Headers

5 headers
Date
Other
Sat, 27 Dec 2025 18:57:13 GMT
Nel
Other
{"report_to":"heroku-nel","response_headers":["Via"],"max_age":3600,"success_fraction":0.01,"failure_fraction":0.1}
Report-To
Other
{"group":"heroku-nel","endpoints":[{"url":"https://nel.heroku.com/reports?s=j638Jj4pKzuknsGbE%2FtX%2F1eqW4HZWxbffTnc%2B6%2Fh20w%3D\u0026sid=812dcc77-0bd0-43b1-a5f1-b25750382959\u0026ts=1766861833"}],"max_age":3600}
Reporting-Endpoints
Other
heroku-nel="https://nel.heroku.com/reports?s=j638Jj4pKzuknsGbE%2FtX%2F1eqW4HZWxbffTnc%2B6%2Fh20w%3D&sid=812dcc77-0bd0-43b1-a5f1-b25750382959&ts=1766861833"
Via
Other
1.1 heroku-router

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching

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