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SECURITY SCORE
Certificate Information
Subject
CN=join.code.berlin
Issuer
C=US, O=Google Trust Services, CN=WE1
Valid From
December 22, 2025
Valid Until
March 22, 2026
72 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA256
SHA-256 Fingerprint
00:AD:DD:3D:F8:4F:01:B2:2C:4A:4F:F0:4F:5E:C1:02:AE:08:39:62:AB:F3:85:67:60:F6:C1:63:80:8D:CE:C1
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
Missing
Not configured
Content-Security-Policy
Basic
default-src; script-src; style-src; +8 more
default-src 'self' https: data: blob:; script-src https: 'unsafe-inline' 'unsafe-eval' blob: data:; style-src https: 'unsafe-inline' data:; img-src * data: blob:; font-src https: data:; connect-src https: wss: data:; media-src https: blob: data:; frame-src https:; object-src 'none'; base-uri 'self'; frame-ancestors *;
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
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • 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
Configured
(Restricts certificate issuance)
Current Issuer
Authorized
(Matches CAA policy)
Authorized CAs
Recommendations
- • Consider using critical flag (flags=128) for stricter CAA enforcement
- • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
- • Consider adding 'issuewild' records to control wildcard certificate issuance