Open
Cached
·
just now
96/100
SECURITY SCORE
Certificate Information
Subject
CN=api.shown.io
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
December 03, 2025
Valid Until
March 03, 2026
65 days
Public Key
RSA
4096 bit
Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
27:A9:63:58:C1:5E:38:9D:5A:D3:2B:87:F0:3D:FA:1C:20:A4:41:32:BB:38:F4:96:37:E7:77:17:A5:98:BC:86
Alternative Names
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
Basic
font-src; frame-ancestors; object-src; +5 more
font-src 'self' *.getpostman.com documenter.postman.com fonts.gstatic.com fonts.googleapis.com *.pstmn.io; frame-ancestors 'none'; object-src 'none'; base-uri 'self'; img-src * data:; script-src 'self' 'strict-dynamic' *.getpostman.com documenter.postman.com documenter-assets.pstmn.io content.pstmn.io run.pstmn.io https://cdn.ravenjs.com 'nonce-xZ0pDGt5aShbsPyF6rwHg4ITzT5yoJLBrPOlOR3nAVT6szPX'; style-src 'self' 'unsafe-inline' *.getpostman.com documenter.postman.com *.pstmn.io fonts.gstatic.com fonts.googleapis.com; frame-src https://youtube.com https://www.youtube.com https://player.vimeo.com
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Missing
Not configured
Recommendations
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • 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
Recommendations
- • Consider using critical flag (flags=128) for stricter CAA enforcement
- • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
- • Consider adding 'issuewild' records to control wildcard certificate issuance