90/100 SECURITY SCORE

Certificate Information

Subject
CN=engineering.aau.dk
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
November 20, 2025
Valid Until
February 18, 2026 53 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
C8:D0:6F:91:C0:82:3E:C3:62:6E:FB:E5:5D:FD:0E:A9:5D:08:43:E6:E1:36:0C:F4:8E:91:07:29:B3:5C:B7:E2
Alternative Names

Security Configuration

TLS Protocols
TLS 1.2
Forward Secrecy
Limited (Check cipher configuration)
Warnings
  • TLS 1.3 is not supported (recommended)

HTTP Security Headers

Status
Strict-Transport-Security
Present
max-age=15768000; includeSubdomains; preload;
Content-Security-Policy
Good
default-src; frame-ancestors; base-uri; +7 more
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
no-referrer, strict-origin-when-cross-origin
Permissions-Policy
Present
geolocation=(),midi=(),sync-xhr=(),microphone=(),camera=(),magnetometer=(),gyroscope=(),fullscreen=(self),payment=()
Recommendations
  • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • Strengthen CSP by removing 'unsafe-eval'

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

2 domains