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
75/100 SECURITY SCORE

Certificate Information

Subject
C=ES, L=Madrid, O=Red Académica y de Investigación Española (RedIRIS), CN=www.rediris.es
Issuer
C=GR, O=Hellenic Academic and Research Institutions CA, CN=GEANT TLS RSA 1
Valid From
April 30, 2025
Valid Until
April 30, 2026 104 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
45:E1:F2:88:92:89:95:54:92:36:E4:50:3B:DB:50:F3:CB:AA:28:06:31:F7:3B:38:14:6D:9D:5A:D7:E0:36:CA
Alternative Names
22 domains

Security Configuration

TLS Protocols
TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

HTTP Security Headers

Status
Strict-Transport-Security
Missing
Not configured
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
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • 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

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Not Authorized (Potential misconfiguration)
Authorized CAs
accv.es fnmt.es harica.gr letsencrypt.org sectigo.com
Incident Reporting
CAA Issues
  • • CRITICAL: Current certificate issuer 'C=GR, O=Hellenic Academic and Research Institutions CA, CN=GEANT TLS RSA 1' is NOT authorized by CAA records. Authorized CAs: accv.es, fnmt.es, harica.gr, letsencrypt.org, sectigo.com
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • You have authorized 5 CAs - consider limiting to only the CAs you actively use
  • • Consider adding 'issuewild' records to control wildcard certificate issuance