Open
Cached
·
just now
92/100
SECURITY SCORE
Certificate Information
Subject
CN=my.corebook.io
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
November 22, 2025
Valid Until
February 20, 2026
31 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
29:79:09:F3:BB:2D:04:79:BA:AF:94:A1:7C:A3:76:90:42:D9:77:58:0D:A3:55:D4:5A:F0:0B:60:94:B8:38:01
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=32000000; includeSubDomains; preload;
Content-Security-Policy
Basic
media-src; frame-ancestors; script-src
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
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
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