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SECURITY SCORE
Certificate Information
Subject
CN=support.nextcloud.com
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
November 28, 2025
Valid Until
February 26, 2026
36 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
A0:93:FD:66:BD:B9:A4:B0:D3:D8:97:FC:DE:58:04:25:15:35:11:41:BA:B9:CF:6B:D2:BD:60:B0:28:AB:94:B9
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=63072000
Content-Security-Policy
Basic
base-uri; default-src; font-src; +5 more
base-uri 'self' https://support.nextcloud.com; default-src 'self' ws: wss: https://images.zammad.com; font-src 'self' data:; img-src * data: blob:; object-src 'none'; script-src 'self' 'unsafe-eval' 'nonce-GTQFC7NZ7OJOk9OMh0cwHg=='; style-src 'self' 'unsafe-inline'; frame-src www.youtube.com player.vimeo.com
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • 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