DNS Gurus
Open Cached · just now
88/100 SECURITY SCORE

Certificate Information

Subject
C=TW, L=臺灣, O=政府機關-行政院-數位發展部, CN=gov.tw
Issuer
C=TW, O=TAIWAN-CA, CN=TWCA Secure SSL Certification Authority
Valid From
March 29, 2025
Valid Until
March 28, 2026 125 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
97:D3:C6:75:91:38:E9:2B:E5:D1:55:08:B0:E6:AF:F4:77:69:4B:52:02:16:AE:53:8A:D6:52:19:DB:3A:13:93
Alternative Names
5 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
Good
max-age=31536000; includeSubDomains
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Present
ALLOW-FROM https://mgr.www.gov.tw
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
  • • Consider adding 'preload' to HSTS for maximum security
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • 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