DNS Gurus
Cached · just now
19 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Missing
Not configured
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

3 headers
Connection
Performance
close
Transfer-Encoding
Performance
chunked
Vary
Performance
Accept-Encoding

Caching Headers

2 headers
Etag
Caching
W/"67976515-1dd7"
Last-Modified
Caching
Mon, 27 Jan 2025 10:51:01 GMT

Content Headers

1 headers
Content-Type
Content
text/html; charset=UTF-8

Server Headers

1 headers
Server
Server
cloudflare

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
__cf_bm=FMRhjwICzo1pnC23AtOHA.i38i3EofeX1O2UJdO3aEc-1769730237-1.0.1.1-E5tngMdJWE64J01c2pPez844N8u9f3OQSVVb3rGJI9jqSdJiuHPNdQKwSeGDU8aKZARG2LbA.Z_49Lghu2YFsGYMZvzNhSOzstXGtfeYxVI; path=/; expires=Fri, 30-Jan-26 00:13:57 GMT; domain=.www.classflow.com; HttpOnly; Secure; SameSite=None

Other Headers

10 headers
Alt-Svc
Other
h3=":443"; ma=86400
Cf-Cache-Status
Other
DYNAMIC
Cf-Ray
Other
9c5c983d0a40aeda-IAD
Date
Other
Thu, 29 Jan 2026 23:43:57 GMT
Ki-Cache-Type
Other
None
Ki-Edge
Other
v=25.3.3;mv=5.0.18
Ki-Origin
Other
g1p
Nel
Other
{"success_fraction":0.01,"report_to":"cf-nel","max_age":604800}
Report-To
Other
{"endpoints":[{"url":"https:\/\/a.nel.cloudflare.com\/report\/v4?s=s1vZ%2Fx8oskwGUdeOgvyEJfli%2B7gixVpmBsZLbbIoxo4VZK5ZWAY0lAMpM%2FvJZXlnhbH%2BNyvznQ%2FI37HkgreTYUYcigqNFUKKUmHqRx79yYKLcgkm44vUO3XBJxa1QYsv%2FYX9"}],"group":"cf-nel","max_age":604800}
X-Edge-Location-Klb
Other
1

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching