DNS Gurus
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81/100 SECURITY SCORE

Certificate Information

Subject
C=US, ST=New York, L=Armonk, O=International Business Machines Corporation, CN=www.ibm.com
Issuer
C=US, O=DigiCert Inc, CN=DigiCert TLS RSA SHA256 2020 CA1
Valid From
March 03, 2025
Valid Until
March 03, 2026 120 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
2C:69:20:A8:EF:4F:B9:D1:48:20:36:F8:8C:B5:E4:51:7B:DE:12:F3:F0:CD:45:5D:CE:C2:0A:0D:36:36:CF:23
Alternative Names
64 domains

Security Configuration

TLS Protocols
TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

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