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SECURITY SCORE
Detected Technologies
Certificate Information
Subject
CN=57ku.cc
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
May 25, 2026
Valid Until
August 23, 2026
59 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
6B:DD:F1:A3:60:B3:30:75:DF:E0:3B:AD:01:EE:C9:7A:D1:A8:0E:B3:84:C7:83:AF:61:29:9F:7A:AF:B0:2C:7D
Alternative Names
Security Configuration
TLS Protocols
TLS 1.0
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
- • 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