DNS Gurus
Open Cached · just now
79/100 SECURITY SCORE

Certificate Information

Subject
C=US, ST=Washington, L=Redmond, O=Microsoft Corporation, CN=outlook.com
Issuer
C=US, O=DigiCert Inc, CN=DigiCert Cloud Services CA-1
Valid From
March 29, 2025
Valid Until
March 28, 2026 144 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
4F:94:1A:8E:50:52:5E:09:24:4F:8F:FE:75:65:E1:6A:51:DD:10:47:04:74:94:6A:0F:BA:84:6A:86:E4:DE:8C
Alternative Names
23 domains

Security Configuration

TLS Protocols
TLS 1.2
Forward Secrecy
Limited (Check cipher configuration)
Warnings
  • • TLS 1.3 is not supported (recommended)

HTTP Security Headers

Status
Strict-Transport-Security
Good
max-age=31536000; includeSubDomains
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
  • • Consider adding 'preload' to HSTS for maximum security
  • • 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
digicert.com globalsign.com entrust.net microsoft.com
Incident Reporting
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • You have authorized 4 CAs - consider limiting to only the CAs you actively use
  • • Consider adding 'issuewild' records to control wildcard certificate issuance