Open
Cached
·
just now
77/100
SECURITY SCORE
Certificate Information
Subject
CN=www.davidxiao.me
Issuer
C=US, O=Google Trust Services, CN=WR3
Valid From
December 05, 2025
Valid Until
March 05, 2026
46 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
DE:B8:EA:F6:95:35:4A:8A:E2:4B:E7:BE:8E:D5:AB:4D:5C:AF:23:D3:B2:55:5F:21:F2:81:F3:47:5A:BD:57:59
Alternative Names
Security Configuration
TLS Protocols
TLS 1.2
TLS 1.3
Forward Secrecy
Supported
(Modern clients use PFS)
HTTP Security Headers
Status
Strict-Transport-Security
Present
max-age=31556926
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Add Content-Security-Policy header to prevent XSS attacks
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
- • Add X-Content-Type-Options: nosniff
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
- • 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
Subject Alternative Names
100 domains
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bodysecret.in
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www.christophschuette.com
www.iiff.co.il
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creatingcalligraphy.com
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credwault.com
www.davidxiao.me
www.drentsealliantietheaters.nl
eqindustries.com
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moneymagnet.finlup.id
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info.gayalo.com
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auth.dev.routestack.nl
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events.vx-events.com
www.windsurfsantapola.com
www.verwalter.woonig.app
dev.wurkouts.com
youconnect.jp
Other domains in certificate