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SECURITY SCORE
Certificate Information
Subject
CN=tcells.org
Issuer
C=US, O=GoDaddy.com, CN=GoDaddy TLS Intermediate CA DV - R1v1
Valid From
October 20, 2026
Valid Until
May 06, 2027
192 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
21:39:F6:9F:3A:8A:94:A1:F8:E6:43:CD:19:98:B0:A2:62:66:4D:E9:78:22:15:0F:F3:38:B2:3B:1E:15:25:12
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
Forward Secrecy
Supported
(Modern clients use PFS)
Warnings
- • TLS 1.3 is not supported (recommended)
HTTP Security Headers
Status
Strict-Transport-Security
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Add Strict-Transport-Security header with max-age of at least 1 year
- • Add Content-Security-Policy header to prevent XSS attacks
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
- • Add X-Content-Type-Options: nosniff
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
- • 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