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SECURITY SCORE
Detected Technologies
Certificate Information
Subject
CN=51admin.bj8791.com
Issuer
C=US, O=Let's Encrypt, CN=YR1
Valid From
August 01, 2026
Valid Until
October 30, 2026
70 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
6B:25:A6:97:7B:68:DC:9E:B7:44:4E:5A:F3:DA:1F:91:74:28:AF:0F:27:57:97:79:57:CF:E6:9C:27:C7:76:91
Alternative Names
Security Configuration
TLS Protocols
TLS 1.1
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
Warnings
- • TLS 1.1 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