DNS Gurus
Cached · just now
94/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 4
GitHub logo GitHub Gravatar logo Gravatar Let's Encrypt logo Let's Encrypt Fastly logo Fastly

Certificate Information

Subject
CN=bestpractices.dev
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
March 14, 2026
Valid Until
June 12, 2026 39 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
11:FB:9D:EB:00:AF:23:A4:C4:17:F5:BE:20:21:82:6D:22:D5:8B:36:46:FA:BB:54:C9:7E:C4:84:FB:61:5F:E8
Alternative Names
1 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
Present
max-age=300
Content-Security-Policy
GitHub logo
Strong
default-src; base-uri; form-action; +5 more Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Present
fullscreen=(), geolocation=(), midi=(); +10 more
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains

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

1 domain
bestpractices.dev