DNS Gurus

SSL Verification Bypassed

The server's SSL certificate could not be verified. The analysis was completed using insecure mode. Data may be less reliable.

Reason:

Hostname Mismatch - certificate is issued for www.silicon.help, ms.dev, cntk.ai, mdcc.dk, msr.dev, msft.dev, mwcci.us, rtos.com, video.ai, not for blog.xamarin.com

Cached · 8m ago
21 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=15768000 ; includeSubDomains ; preload
Content-Security-Policy
Basic
script-src; worker-src
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Missing
Not configured
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Improve CSP by adding more specific directives and removing 'unsafe-inline'
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

2 headers
Connection
Performance
Transfer-Encoding
Transfer-Encoding
Performance
chunked

Caching Headers

1 headers
Cache-Control
Caching
must-revalidate, max-age=600

Content Headers

1 headers
Content-Type
Content
text/html; charset=UTF-8

Server Headers

2 headers
Server
Server
nginx
X-Powered-By
Server
WP Engine

CORS Headers

3 headers
Access-Control-Allow-Headers
Cors
Content-Type, Authorization
Access-Control-Allow-Methods
Cors
GET, POST, OPTIONS
Access-Control-Allow-Origin
Cors
https://dev.quantum.microsoft.com

Cookies Headers

0 headers
No cookies headers found

Other Headers

6 headers
Date
Other
Tue, 30 Dec 2025 02:44:36 GMT
Feature-Policy
Other
geolocation 'none'; midi 'none'; sync-xhr 'none'; microphone 'none'; camera 'none'; magnetometer 'none'; gyroscope 'none'; fullscreen 'self'; payment 'none'
Link
Other
<https://devblogs.microsoft.com/xamarin/wp-json/>; rel="https://api.w.org/"
Server-Timing
Other
wp-before-template;dur=80.06
X-Cache-Group
Other
normal
X-Cacheable
Other
SHORT

Recommendations

Enable compression (gzip/brotli) to improve performance

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