DNS Gurus
Cached · just now
86/100 SECURITY SCORE

Certificate Information

Subject
CN=gm5r9ztsfwyxf6cg8dhmok62rrgeyegn.island.io
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
January 21, 2026
Valid Until
April 21, 2026 85 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
AC:7F:88:95:7C:9D:EB:36:27:BC:DC:2B:95:A5:E8:9B:BC:77:B3:83:CE:CB:F2:49:F5:8A:D5:10:E5:4E:DF:10
Alternative Names
34 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=259200
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
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
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • 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
letsencrypt.org globalsign.com
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