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SECURITY SCORE
Certificate Information
Subject
CN=mui.com
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
November 06, 2025
Valid Until
February 04, 2026
57 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
14:23:D0:77:95:44:C2:B1:D9:62:FE:45:D0:CF:A5:78:6A:5E:B1:2E:4F:6E:98:3C:A5:79:F3:08:12:3C:9D:6E
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
default-src; script-src; script-src-elem; +7 more
default-src * data: mediastream: blob: filesystem: about: ws: wss: 'unsafe-eval' 'wasm-unsafe-eval' 'unsafe-inline'; script-src * data: blob: 'unsafe-inline' 'unsafe-eval'; script-src-elem * data: blob: 'unsafe-inline'; connect-src * data: blob: 'unsafe-inline'; img-src * data: blob: 'unsafe-inline'; media-src * data: blob: 'unsafe-inline'; frame-src * data: blob: ; style-src * data: blob: 'unsafe-inline'; font-src * data: blob: 'unsafe-inline'; frame-ancestors *;
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