DNS Gurus
Open Cached · just now
84/100 SECURITY SCORE

Certificate Information

Subject
CN=craft.onstuimig.nl
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
October 14, 2025
Valid Until
January 12, 2026 52 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
BA:87:C6:2D:65:76:7E:BA:30:0D:5A:AB:7A:D6:52:9E:0C:D5:3F:44:B4:27:D8:17:48:88:59:7C:01:BD:F5:D3
Alternative Names
6 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
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Present
accelerometer=(self),autoplay=*,camera=(self),cross-origin-isolated=(self),display-capture=(self),document-domain=(self),encrypted-media=(self),fullscreen=*,geolocation=(self),gyroscope=(self),magnetometer=(self),microphone=(self),midi=(self),payment=(self),picture-in-picture=*,publickey-credentials-get=(self),screen-wake-lock=(self),sync-xhr=(self),usb=(self),web-share=(self),xr-spatial-tracking=(self)
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)

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