DNS Gurus
Cached · just now
22 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=31556952
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
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • 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

3 headers
Accept-Ranges
Performance
bytes
Connection
Performance
close
Vary
Performance
Accept-Encoding

Caching Headers

5 headers
Age
Caching
0
Cache-Control
Caching
max-age=600
Etag
Caching
"6260e9ee-9ee41"
Expires
Caching
Fri, 16 Jan 2026 14:16:24 GMT
Last-Modified
Caching
Thu, 21 Apr 2022 05:21:50 GMT

Content Headers

2 headers
Content-Length
Content
650817
Content-Type
Content
text/html; charset=utf-8

Server Headers

1 headers
Server
Server
GitHub.com

CORS Headers

1 headers
Access-Control-Allow-Origin
Cors
*

Cookies Headers

0 headers
No cookies headers found

Other Headers

9 headers
Date
Other
Fri, 16 Jan 2026 14:06:24 GMT
Via
Other
1.1 varnish
X-Cache
Other
MISS
X-Cache-Hits
Other
0
X-Fastly-Request-Id
Other
d2dbb4fc5a87f4f525eca0b1e38896a2edc6a057
X-Github-Request-Id
Other
260A:27A875:2B09AA:31967B:696A45DE
X-Proxy-Cache
Other
MISS
X-Served-By
Other
cache-nyc-kteb1890054-NYC
X-Timer
Other
S1768572384.152666,VS0,VE52

Recommendations

Enable compression (gzip/brotli) to improve performance