DNS Gurus
Open Cached · just now
78/100 SECURITY SCORE

Certificate Information

Subject
C=IT, ST=Toscana, O=Università degli Studi di Firenze, CN=www.unifi.it
Issuer
C=NL, O=GEANT Vereniging, CN=GEANT OV RSA CA 4
Valid From
December 05, 2024
Valid Until
December 05, 2025 26 days
Public Key
RSA 3072 bit Adequate
Signature Algorithm
SHA384-RSA
SHA-256 Fingerprint
A2:6C:EA:47:2E:2C:D3:7D:EE:89:0C:E8:66:52:91:FF:8B:44:DF:DE:3C:9D:61:01:38:78:58:F2:F0:D1:66:15
Alternative Names
4 domains

Security Configuration

TLS Protocols
TLS 1.2 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
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

CAA Records (Certificate Authority Authorization)

CAA Records
Not Configured (Any CA can issue certificates)
CAA Issues
  • • No CAA records configured - any CA can issue certificates
Recommendations
  • • Implement CAA records to restrict which CAs can issue certificates for your domain
  • • This adds an extra layer of security against unauthorized certificate issuance
  • • Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
  • • Consider adding 'iodef' record to receive security incident reports