Open
Cached
·
just now
90/100
SECURITY SCORE
Certificate Information
Subject
C=NL, L=Utrecht, O=Universiteit Utrecht, CN=uu.nl
Issuer
C=GR, O=Hellenic Academic and Research Institutions CA, CN=GEANT TLS ECC 1
Valid From
July 22, 2026
Valid Until
February 06, 2027
179 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
04:BB:E0:09:95:DE:09:0C:F5:A1:C9:31:32:FC:44:EC:DC:E6:7E:13:78:D5:04:0A:29:17:E4:B4:0A:26:E3:65
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
HTTP Security Headers
Status
Strict-Transport-Security
Excellent
max-age=31536000; includeSubDomains; preload;
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Present
camera=(), gyroscope=(), magnetometer=(); +3 more
Recommendations
- • Add Content-Security-Policy header to prevent XSS attacks
CAA Records (Certificate Authority Authorization)
CAA Records
Configured
(Restricts certificate issuance)
Current Issuer
Not Authorized
(Potential misconfiguration)
Authorized CAs
Wildcard CAs
Incident Reporting
mailto:[email protected]
CAA Issues
- • CRITICAL: Current certificate issuer 'C=GR, O=Hellenic Academic and Research Institutions CA, CN=GEANT TLS ECC 1' is NOT authorized by CAA records. Authorized CAs: sectigo.com, harica.gr, digicert.com, letsencrypt.org
Recommendations
- • Consider using critical flag (flags=128) for stricter CAA enforcement
- • You have authorized 4 CAs - consider limiting to only the CAs you actively use