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.fit.vutbr.cz, www4.fit.vutbr.cz, www6.fit.vutbr.cz, not for www-tereza.fit.vutbr.cz

Cached · just now
15 Headers

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=15768000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Good
sameorigin
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
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
  • • Consider adding Permissions-Policy to control browser features

Performance Headers

3 headers
Connection
Performance
Upgrade, close
Transfer-Encoding
Performance
chunked
Vary
Performance
Accept-Language,Accept-Encoding

Caching Headers

2 headers
Cache-Control
Caching
private, max-age=0, no-cache
Pragma
Caching
no-cache

Content Headers

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

Server Headers

1 headers
Server
Server
Apache

CORS Headers

0 headers
No CORS headers found

Cookies Headers

1 headers
Set-Cookie
Cookies
logoShown=1; path=/; secure; HttpOnly; SameSite=Lax

Other Headers

3 headers
Date
Other
Sun, 04 Jan 2026 05:44:50 GMT
Upgrade
Other
h2
X-Ua-Compatible
Other
IE=edge

Recommendations

Enable compression (gzip/brotli) to improve performance