DNS Gurus
Open Cached · just now
78/100 SECURITY SCORE

Certificate Information

Subject
UNKNOWN={:asn1_OPENTYPE, <<12, 20, 80, 114, 105, 118, 97, 116, 101, 32, 79, 114, 103, 97, 110, 105, 122, 97, 116, 105, 111, 110>>}, UNKNOWN=011001042496, UNKNOWN={:asn1_OPENTYPE, <<19, 2, 74, 80>>}, C=JP, ST=東京都, L=渋谷区, UNKNOWN={:asn1_OPENTYPE, <<12, 18, 230, 161, 156, 228, 184, 152, 231, 148, 186, 50, 54, 231, 149, 170, 49, 229, 143, 183>>}, O=GMOペパボ株式会社, CN=www.heteml.jp
Issuer
C=BE, O=GlobalSign nv-sa, CN=GlobalSign GCC R3 EV TLS CA 2025
Valid From
October 15, 2025
Valid Until
November 16, 2026 353 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
43:4B:D7:C8:40:62:37:12:A3:13:29:68:FA:84:3D:0E:F7:2D:AB:C9:66:75:0C:C9:0A:59:DB:C8:F5:68:31:00
Alternative Names
2 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=15724800
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
  • • 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
  • • 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

2 domains
heteml.jp www.heteml.jp