DNS Gurus
Cached · just now
83/100 SECURITY SCORE

Certificate Information

Subject
CN=jostle.us
Issuer
C=US, O=Amazon, CN=Amazon RSA 2048 M01
Valid From
November 12, 2025
Valid Until
December 11, 2026 347 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
C1:43:A6:2B:5D:E7:98:CC:B5:B7:4A:CD:0E:DC:6F:FA:C9:90:50:F2:A5:ED:26:1B:6A:34:DA:AE:CC:1D:BA:9A
Alternative Names
1 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
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 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
letsencrypt.org amazon.com digicert.com
Wildcard CAs
amazon.com digicert.com letsencrypt.org
Incident Reporting
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement

Subject Alternative Names

1 domain
jostle.us