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:

Unknown Certificate Authority - the server's certificate is not trusted

Cached · just now
10 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Missing
Not configured
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • 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

2 headers
Connection
Performance
close
Vary
Performance
Accept-Encoding

Caching Headers

2 headers
Cache-Control
Caching
must-revalidate, no-cache, private
Expires
Caching
Sun, 19 Nov 1978 05:00:00 GMT

Content Headers

2 headers
Content-Language
Content
de
Content-Type
Content
text/html; charset=UTF-8

Server Headers

0 headers
No server headers found

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
TS01ea9b44=0195ed2da381fdf12f4839a4d0da4abf0638e5124f8d28989ce72698f022845d2f0ec46ae0bbfbba17a8939611271ebf790f005d7565c7f149105ed27aef95972cb8ee9b57afd891a6adefb41698a06200b6324cf2; Path=/; Domain=.www.1und1.net

Other Headers

1 headers
Date
Other
Sun, 18 Jan 2026 22:39:50 GMT

Recommendations

Enable compression (gzip/brotli) to improve performance