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=public-data.telemetry.mozilla.org
Issuer
C=US, O=Let's Encrypt, CN=YR1
Valid From
September 25, 2026
Valid Until
December 24, 2026 74 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
CD:9C:EA:8D:79:6F:4F:22:63:47:F8:84:FC:02:CC:C5:8A:E3:BD:E0:4B:87:F4:0B:6A:6C:26:D0:47:36:D8:DD
Alternative Names
1 domains

Security Configuration

TLS Protocols
TLS 1.0 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
  • • TLS 1.0 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

Subject Alternative Names

1 domain
public-data.telemetry.mozilla.org