DNS Gurus
Cached · just now
92/100 SECURITY SCORE

Certificate Information

Subject
CN=docs.collaboradmins.com
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
November 22, 2025
Valid Until
February 20, 2026 38 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
0C:81:1B:62:90:2F:18:A5:55:3C:8B:97:B8:F5:20:3F:D4:D8:35:95:8C:97:F9:AC:67:53:6A:F1:E7:04:0A:D2
Alternative Names
3 domains

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=31536000
Content-Security-Policy
Good
base-uri; default-src; style-src; +5 more
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
  • • Strengthen CSP by removing 'unsafe-eval'
  • • 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

Subject Alternative Names

3 domains
docs.collabora.com

Other domains in certificate

docs.collaboradmins.com dokr21-cl-prod-nbg1-hzc.collaboradmins.com