DNS Gurus
Open Cached · just now
79/100 SECURITY SCORE

Certificate Information

Subject
CN=*.alpha.sufio.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
November 11, 2025
Valid Until
February 09, 2026 62 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
9D:B2:01:05:70:32:F9:03:6D:C5:76:44:48:6F:32:25:76:3A:8E:84:FE:FB:EF:08:6B:5D:B9:A4:18:F4:AD:7E
Alternative Names
91 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
Good
max-age=31536000; includeSubDomains
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Consider adding 'preload' to HSTS for maximum security
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • 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
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

91 domains
alpha.sufio.com argocd.sufio.com beta.sufio.com chi.sufio.com delta.sufio.com epsilon.sufio.com eta.sufio.com gamma.sufio.com iota.sufio.com kappa.sufio.com lambda.sufio.com mu.sufio.com nu.sufio.com omega.sufio.com omicron.sufio.com phi.sufio.com pi.sufio.com prefect-alpha.sufio.com prefect-delta.sufio.com prefect-gamma.sufio.com prefect-iota.sufio.com prefect-kappa.sufio.com prefect-lambda.sufio.com prefect-omega.sufio.com prefect-sigma.sufio.com psi.sufio.com rho.sufio.com rook-test.sufio.com sigma.sufio.com sourcegraph.sufio.com tau.sufio.com theta.sufio.com upsilon.sufio.com xi.sufio.com zeta.sufio.com *.alpha.sufio.com *.beta.sufio.com *.chi.sufio.com *.delta.sufio.com *.epsilon.sufio.com *.eta.sufio.com *.gamma.sufio.com *.iota.sufio.com *.kappa.sufio.com *.lambda.sufio.com *.mu.sufio.com *.nu.sufio.com *.omega.sufio.com *.omicron.sufio.com *.phi.sufio.com *.pi.sufio.com *.psi.sufio.com *.rho.sufio.com *.sigma.sufio.com *.tau.sufio.com *.theta.sufio.com *.upsilon.sufio.com *.xi.sufio.com *.zeta.sufio.com

Other domains in certificate

alpha.sufio.de *.alpha.sufio.de delta.sufio.de *.delta.sufio.de gamma.sufio.de *.gamma.sufio.de iota.sufio.de *.iota.sufio.de kappa.sufio.de *.kappa.sufio.de lambda.sufio.de *.lambda.sufio.de omega.sufio.de *.omega.sufio.de sigma.sufio.de *.sigma.sufio.de
alpha.sufio.fr *.alpha.sufio.fr delta.sufio.fr *.delta.sufio.fr gamma.sufio.fr *.gamma.sufio.fr iota.sufio.fr *.iota.sufio.fr kappa.sufio.fr *.kappa.sufio.fr lambda.sufio.fr *.lambda.sufio.fr omega.sufio.fr *.omega.sufio.fr sigma.sufio.fr *.sigma.sufio.fr