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SECURITY SCORE
Certificate Information
Subject
CN=athlo.app
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
October 09, 2025
Valid Until
January 07, 2026
53 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
3F:49:A3:B7:F1:83:1E:63:9B:62:DD:95:33:35:5E:D4:99:C4:EC:E1:64:35:19:81:65:83:19:3F:B3:DD:1D:D8
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
Present
max-age=31536000
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
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • 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
Wildcard CAs
CAA Issues
- • CRITICAL: Current certificate issuer 'C=US, O=Let's Encrypt, CN=R13' is NOT authorized by CAA records. Authorized CAs: amazon.com, pki.goog
Recommendations
- • Consider using critical flag (flags=128) for stricter CAA enforcement
- • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts