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SECURITY SCORE
Certificate Information
Subject
CN=lists.uc.foundation
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
October 14, 2025
Valid Until
January 12, 2026
63 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
D7:D4:19:D5:2A:F3:19:C2:8E:68:33:79:BF:37:26:A9:A8:22:08:79:CF:E5:BA:54:D5:18:4E:5D:65:8B:DC:48
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
Forward Secrecy
Limited
(Check cipher configuration)
Warnings
- • TLS 1.3 is not supported (recommended)
HTTP Security Headers
Status
Strict-Transport-Security
Missing
Not configured
Content-Security-Policy
Weak
frame-ancestors
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Present
ch-ua-platform=(self), ch-ua-platform-version=(self), ch-ua-mobile=(self), ch-ua-model=(self), ch-ua-full-version-list=(self)
Recommendations
- • Add Strict-Transport-Security header with max-age of at least 1 year
- • Significantly strengthen CSP directives
- • Add X-Content-Type-Options: nosniff
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
CAA Records (Certificate Authority Authorization)
CAA Records
Configured
(Restricts certificate issuance)
Current Issuer
Authorized
(Matches CAA policy)
Authorized CAs
Recommendations
- • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
- • Consider adding 'issuewild' records to control wildcard certificate issuance