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SECURITY SCORE
Certificate Information
Subject
CN=buttleuk.org
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
November 05, 2025
Valid Until
February 03, 2026
55 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
E8:9F:D1:A7:9E:C0:32:5D:31:79:D9:A5:77:60:C9:E2:1D:14:3B:0A:D6:98:40:C3:EE:D7:72:DD:36:76:76:F2
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
Present
max-age=2592000
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Good
sameorigin
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
origin-when-cross-origin
Permissions-Policy
Present
accelerometer=(self), autoplay=(self), camera=(self), encrypted-media=(self), fullscreen=(self), geolocation=(self), gyroscope=(self), magnetometer=(self), microphone=(self), midi=(self), payment=(self), usb=(self)
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Add Content-Security-Policy header to prevent XSS attacks
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