DNS Gurus
Open Cached · just now
80/100 SECURITY SCORE

Certificate Information

Subject
C=US, ST=California, O=Proofpoint, Inc., CN=www.proofpoint.com
Issuer
C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication CA OV R36
Valid From
August 11, 2025
Valid Until
August 11, 2026 276 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
AB:6F:B5:94:49:93:C8:4C:3D:98:0C:E4:8F:07:4B:61:F9:18:7C:33:70:F0:72:D7:E9:00:E4:24:85:60:41:AF
Alternative Names
57 domains

Security Configuration

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

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Not Authorized (Potential misconfiguration)
Authorized CAs
thawte.com comodo.com
CAA Issues
  • • CRITICAL: Current certificate issuer 'C=GB, O=Sectigo Limited, CN=Sectigo Public Server Authentication CA OV R36' is NOT authorized by CAA records. Authorized CAs: thawte.com, comodo.com
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
  • • Consider adding 'issuewild' records to control wildcard certificate issuance