DNS Gurus
Cached · just now
81/100 SECURITY SCORE

Certificate Information

Subject
CN=mktru.tw
Issuer
C=AT, O=ZeroSSL, CN=ZeroSSL RSA Domain Secure Site CA
Valid From
December 29, 2025
Valid Until
March 29, 2026 89 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA384-RSA
SHA-256 Fingerprint
43:28:16:26:37:48:7C:50:17:AD:D4:64:89:ED:5B:3A:A3:77:C5:BC:1B:A3:7A:D8:9A:80:A5:65:83:EB:71:96
Alternative Names
40 domains

Security Configuration

TLS Protocols
TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

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