DNS Gurus
Cached · just now
18 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=31536000
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
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • 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

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

Caching Headers

4 headers
Age
Caching
2361
Cache-Control
Caching
max-age=85082
Expires
Caching
Thu, 05 Feb 2026 12:30:11 GMT
Pragma
Caching
public

Content Headers

3 headers
Content-Language
Content
de-DE
Content-Length
Content
337224
Content-Type
Content
text/html; charset=utf-8

Server Headers

1 headers
Server
Server
Apache/2.4

CORS Headers

1 headers
Access-Control-Allow-Origin
Cors
*

Cookies Headers

0 headers
No cookies headers found

Other Headers

3 headers
Date
Other
Wed, 04 Feb 2026 12:52:09 GMT
Link
Other
<https://www.uni-koeln.de/>; rel="canonical"
X-Ua-Compatible
Other
IE=edge

Recommendations

Enable compression (gzip/brotli) to improve performance