DNS Gurus
Cached · just now
86/100 SECURITY SCORE

Certificate Information

Subject
CN=tls.automattic.com
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
January 20, 2026
Valid Until
April 20, 2026 79 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
D0:A8:E6:EB:13:39:36:AC:89:50:DD:C7:C8:48:86:15:6F:50:B8:70:4A:53:B5:1E:CA:84:33:B4:B5:99:86:04
Alternative Names
44 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=31536000; includeSubdomains; preload
Content-Security-Policy
Strong
default-src; script-src; style-src; +9 more
X-Frame-Options
Good
SAMEORIGIN
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 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
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