DNS Gurus
Open Cached · just now
91/100 SECURITY SCORE

Certificate Information

Subject
CN=apnic.academy
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
November 04, 2025
Valid Until
February 02, 2026 89 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
C0:69:4A:4D:4C:BB:C8:EC:05:D0:75:31:CF:0F:34:9C:BD:EF:E9:66:17:91:CA:DE:12:8D:03:B6:E3:DC:FC:8A
Alternative Names
34 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
Present
max-age=15552000; preload
Content-Security-Policy
Weak
frame-ancestors
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
no-referrer, same-origin, strict-origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Significantly strengthen CSP directives
  • • Consider adding Permissions-Policy to control browser features

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
sectigo.com amazon.com letsencrypt.org digicert.com ; cansignhttpexchanges=yes ssl.com pki.goog ; cansignhttpexchanges=yes
Wildcard CAs
digicert.com ; cansignhttpexchanges=yes ssl.com letsencrypt.org pki.goog ; cansignhttpexchanges=yes sectigo.com amazon.com
Incident Reporting
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • You have authorized 6 CAs - consider limiting to only the CAs you actively use