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just now
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SECURITY SCORE
Certificate Information
Subject
CN=api.libreoffice.org
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
October 30, 2025
Valid Until
January 28, 2026
76 days
Public Key
RSA
4096 bit
Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
49:4D:6D:DA:09:0A:A2:F3:AE:B6:DE:AB:1B:B3:C9:56:46:B5:3E:09:E0:E9:F6:42:CF:FB:7D:A7:B7:79:69:ED
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
Good
max-age=31557600; includeSubDomains
Content-Security-Policy
Basic
default-src; form-action; frame-ancestors; +4 more
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Missing
Not configured
Recommendations
- • Consider adding 'preload' to HSTS for maximum security
- • 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