DNS Gurus
Cached · just now
25 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=31536000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Excellent
Deny
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • 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
Age
Caching
288
Cache-Control
Caching
s-maxage=900, stale-if-error=900

Content Headers

2 headers
Content-Language
Content
en
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
_cfuvid=zRKnBFbYcEWywNQwfBOAHrMhj8EBmGT8tUrSj7_MQwI-1767057105082-0.0.1.1-604800000; path=/; domain=.teachable.com; HttpOnly; Secure; SameSite=None

Other Headers

12 headers
Alt-Svc
Other
h3=":443"; ma=86400
Cf-Cache-Status
Other
DYNAMIC
Cf-Ray
Other
9b5daa3a4d6b3019-IAD
Date
Other
Tue, 30 Dec 2025 01:11:45 GMT
Rndr-Id
Other
3d229d58-10c4-4f7d
Speculation-Rules
Other
"/cdn-cgi/speculation"
X-Dns-Prefetch-Control
Other
off
X-Download-Options
Other
noopen
X-Ratelimit-Limit
Other
100
X-Ratelimit-Remaining
Other
99
X-Ratelimit-Reset
Other
1766531696
X-Render-Origin-Server
Other
Render

Recommendations

Enable compression (gzip/brotli) to improve performance