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SECURITY SCORE
Certificate Information
Subject
CN=callpage.io
Issuer
C=AT, O=ZeroSSL, CN=ZeroSSL RSA Domain Secure Site CA
Valid From
November 05, 2025
Valid Until
February 03, 2026
22 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA384-RSA
SHA-256 Fingerprint
F4:34:4E:50:83:31:AD:2B:1D:4E:13:BD:38:C5:CF:51:6B:9C:44:01:B8:27:94:03:C5:CB:BA:B7:3A:6B:09:AD
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
default-src; script-src; style-src; +4 more
default-src 'self';script-src 'self' 'unsafe-inline' 'unsafe-eval' *;style-src 'self' 'unsafe-inline' *;frame-src 'self' *;connect-src 'self' https:;img-src 'self' data: blob: https://dl.airtable.com;media-src 'self' data: blob:
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer
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