Open
Cached
·
just now
89/100
SECURITY SCORE
Certificate Information
Subject
CN=trust.responsive.io
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
December 24, 2025
Valid Until
March 24, 2026
87 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
9E:4F:62:13:E8:63:10:B2:F7:44:13:E5:C0:AE:F4:55:2A:E8:E6:2E:A9:6B:24:FB:CC:62:43:DD:15:82:D7:FC
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=31536000; includeSubDomains
Content-Security-Policy
Basic
upgrade-insecure-requests:; connect-src; font-src; +6 more
upgrade-insecure-requests: default-src https: blob:; connect-src 'self' https: ws: blob:; font-src https: data:; frame-src https:; img-src https: data: blob:; media-src https:; object-src https:; script-src 'unsafe-inline' 'unsafe-eval' https:; style-src 'unsafe-inline' https: blob:;
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Present
geolocation=(), microphone=(self), camera=(), payment=()
Recommendations
- • Consider adding 'preload' to HSTS for maximum security
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
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