DNS Gurus
Cached · 4h ago
13 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
Missing
Not configured
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 X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

2 headers
Connection
Performance
close
Transfer-Encoding
Performance
chunked

Caching Headers

0 headers
No caching headers found

Content Headers

1 headers
Content-Type
Content
text/plain

Server Headers

1 headers
Server
Server
cloudflare

CORS Headers

0 headers
No CORS headers found

Cookies Headers

0 headers
No cookies headers found

Other Headers

9 headers
Alt-Svc
Other
h3=":443"; ma=86400
Cf-Cache-Status
Other
DYNAMIC
Cf-Ray
Other
9c0f11f10f7b7d61-IAD
Date
Other
Tue, 20 Jan 2026 13:55:32 GMT
Location
Other
https://www.cossie.dev/
Nel
Other
{"report_to":"cf-nel","success_fraction":0.0,"max_age":604800}
Refresh
Other
0;url=https://www.cossie.dev/
Report-To
Other
{"group":"cf-nel","max_age":604800,"endpoints":[{"url":"https://a.nel.cloudflare.com/report/v4?s=s0qap6d1qYLfesJhck43M1oJHEErrNhlylAlThPMkhrnV8Ndhvb0O2zZYoSUvhDtaGDOBeaRhhExx3CUNtVBpmc2Y6Bl57bS83b46%2Bem"}]}
Server-Timing
Other
cfEdge;dur=17,cfOrigin;dur=61

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching