DNS Gurus
Cached · just now
89/100 SECURITY SCORE

Certificate Information

Subject
CN=flipbook.comlaude.com
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
January 01, 2026
Valid Until
April 01, 2026 62 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
53:9B:83:90:DC:37:46:32:C7:CC:58:C4:F3:F4:75:ED:9A:36:0C:EF:2B:73:68:4F:1E:69:5F:1F:10:D6:0D:DB
Alternative Names
1 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; includeSubDomains; preload
Content-Security-Policy
Weak
frame-ancestors; form-action; upgrade-insecure-requests; +1 more
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Present
accelerometer=(), autoplay=*, camera=(), document-domain=(), encrypted-media=(), fullscreen=*, geolocation=(), gyroscope=(), magnetometer=(), microphone=(), midi=(), payment=*, sync-xhr=*, usb=()
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Significantly strengthen CSP directives

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

Subject Alternative Names

1 domain
flipbook.comlaude.com