DNS Gurus
Cached · just now
26 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Weak
max-age=0
Content-Security-Policy
Missing
Not configured
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
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • 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

0 headers
No caching headers found

Content Headers

1 headers
Content-Type
Content
text/html

Server Headers

2 headers
Server
Server
cloudflare
X-Runtime
Server
0.001721

CORS Headers

2 headers
Access-Control-Allow-Methods
Cors
GET
Access-Control-Allow-Origin
Cors
*

Cookies Headers

1 headers
Set-Cookie
Cookies
_cfuvid=ukW4ym5cy6UfFFJ6nxrjxHknPeoA1lwD_02lAh9jGiQ-1766983568921-0.0.1.1-604800000; 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
9b56a6e979e028b8-IAD
Date
Other
Mon, 29 Dec 2025 04:46:08 GMT
Speculation-Rules
Other
"/cdn-cgi/speculation"
Via
Other
1.1 google
X-Download-Options
Other
noopen
X-Fedora-School-Id
Other
none
X-Gcp-Cdn-Cache-Id
Other
IAD
X-Gcp-Cdn-Cache-Status
Other
miss
X-Permitted-Cross-Domain-Policies
Other
none
X-Request-Id
Other
a55d69b1-3c2c-44a4-9021-7145c59866e7

Recommendations

Enable compression (gzip/brotli) to improve performance

Add Cache-Control header to optimize caching

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