DNS Gurus
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21 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=900
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

4 headers
Age
Caching
0
Cache-Control
Caching
public, max-age=0
Etag
Caching
W/"3bbd-19bb38d94d8"
Last-Modified
Caching
Mon, 12 Jan 2026 18:52:39 GMT

Content Headers

2 headers
Content-Length
Content
15293
Content-Type
Content
text/html; charset=UTF-8

Server Headers

2 headers
Server
Server
Heroku
X-Powered-By
Server
Express

CORS Headers

0 headers
No CORS headers found

Cookies Headers

0 headers
No cookies headers found

Other Headers

9 headers
Date
Other
Thu, 15 Jan 2026 15:24:56 GMT
Nel
Other
{"report_to":"heroku-nel","response_headers":["Via"],"max_age":3600,"success_fraction":0.01,"failure_fraction":0.1}
Report-To
Other
{"group":"heroku-nel","endpoints":[{"url":"https://nel.heroku.com/reports?s=CkpPhxRHKZIvjjLjV%2BUb22Q0A4DJQlOCAtPNoZmJocA%3D\u0026sid=67ff5de4-ad2b-4112-9289-cf96be89efed\u0026ts=1768490696"}],"max_age":3600}
Reporting-Endpoints
Other
heroku-nel="https://nel.heroku.com/reports?s=CkpPhxRHKZIvjjLjV%2BUb22Q0A4DJQlOCAtPNoZmJocA%3D&sid=67ff5de4-ad2b-4112-9289-cf96be89efed&ts=1768490696"
Via
Other
1.1 heroku-router, 1.1 varnish
X-Cache
Other
MISS
X-Cache-Hits
Other
0
X-Served-By
Other
cache-iad-kcgs7200080-IAD
X-Timer
Other
S1768490696.324737,VS0,VE12

Recommendations

Enable compression (gzip/brotli) to improve performance

Consider removing X-Powered-By header to hide server technology