DNS Gurus
Open Cached · just now
91/100 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 280 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 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

HTTP Security Headers

Status
Strict-Transport-Security
Excellent
max-age=31536000; includeSubDomains; preload
Content-Security-Policy
Basic
default-src; script-src; object-src; +10 more
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
  • • Improve CSP by adding more specific directives and removing 'unsafe-inline'
  • • Consider adding Permissions-Policy to control browser features

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