Open
Cached
·
just now
74/100
SECURITY SCORE
Certificate Information
Subject
CN=www.energy-gateway.co.jp
Issuer
C=BE, O=GlobalSign nv-sa, CN=GlobalSign GCC R3 DV TLS CA 2020
Valid From
July 29, 2025
Valid Until
August 30, 2026
281 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
4F:F8:12:8D:3E:50:28:88:F9:DB:73:B9:84:AD:37:68:4F:5A:CA:77:47:7E:4A:C0:D3:83:3E:4F:02:94:DA:46
Alternative Names
Security Configuration
TLS Protocols
TLS 1.0
TLS 1.1
TLS 1.2
Forward Secrecy
Limited
(Check cipher configuration)
Warnings
- • TLS 1.3 is not supported (recommended)
- • TLS 1.1 is deprecated and should be disabled
- • TLS 1.0 is deprecated and should be disabled
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