DNS Gurus
Cached · just now
81/100 SECURITY SCORE

Detected Technologies

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Let's Encrypt logo Let's Encrypt

Certificate Information

Subject
CN=search-demo.dataone.org
Issuer
C=US, O=Let's Encrypt, CN=YR1
Valid From
July 23, 2026
Valid Until
October 21, 2026 80 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
82:71:6B:15:EA:22:50:A2:9C:2E:34:A5:AA:48:B1:C4:42:6B:F4:35:6A:CF:63:23:3C:8B:98:03:AB:7E:56:71
Alternative Names
8 domains

Security Configuration

TLS Protocols
TLS 1.1 TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)
Warnings
  • • TLS 1.1 is deprecated and should be disabled

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