DNS Gurus
Open Cached · just now
78/100 SECURITY SCORE

Certificate Information

Subject
CN=greenhouse.io
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
October 25, 2025
Valid Until
January 23, 2026 57 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
46:A8:A1:5E:19:85:EF:1E:5D:BD:F9:FF:E7:5F:A3:86:02:34:83:0C:B7:E7:80:86:8B:88:C1:BA:93:D3:31:42
Alternative Names
14 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
Missing
Not configured
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • Add X-Content-Type-Options: nosniff
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
  • • Consider adding Permissions-Policy to control browser features

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
amazon.com amazonaws.com amazontrust.com awstrust.com comodoca.com digicert.com globalsign.com godaddy.com letsencrypt.org pki.goog ; cansignhttpexchanges=yes
Wildcard CAs
globalsign.com letsencrypt.org pki.goog ; cansignhttpexchanges=yes amazon.com amazonaws.com amazontrust.com awstrust.com digicert.com
Incident Reporting
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • You have authorized 10 CAs - consider limiting to only the CAs you actively use