DNS Gurus
Open Cached · just now
92/100 SECURITY SCORE

Certificate Information

Subject
CN=postman.com
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
November 01, 2025
Valid Until
January 30, 2026 88 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
14:B0:09:D4:EA:8A:81:EE:BD:76:2A:B1:B8:80:A3:22:43:05:AB:7A:1E:FC:71:16:80:64:63:E1:2F:BE:A1:73
Alternative Names
3 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
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • 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 digicert.com letsencrypt.org pki.goog ; cansignhttpexchanges=yes
Wildcard CAs
digicert.com letsencrypt.org pki.goog ; cansignhttpexchanges=yes amazon.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