DNS Gurus
Cached · just now
88/100 SECURITY SCORE

Certificate Information

Subject
CN=sentryone.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
January 15, 2026
Valid Until
April 15, 2026 88 days
Public Key
RSA 3072 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
4B:AC:57:7B:36:21:3D:61:DA:36:0B:43:65:8F:0C:35:03:3B:96:3C:47:E8:70:FB:BB:D9:E3:DA:C8:BE:3B:5C
Alternative Names
49 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
Good
max-age=31536000 ; includeSubDomains
Content-Security-Policy
Weak
frame-ancestors
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Present
accelerometer=(), camera=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), payment=(), usb=(), interest-cohort=()
Recommendations
  • • Consider adding 'preload' to HSTS for maximum security
  • • Significantly strengthen CSP directives
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking

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