DNS Gurus
Cached · just now
91/100 SECURITY SCORE

Certificate Information

Subject
CN=*.redirect.overdrive.com
Issuer
C=US, O=Google Trust Services, CN=WR1
Valid From
January 05, 2026
Valid Until
April 05, 2026 82 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
B1:6A:21:6A:58:96:78:FF:28:FA:C0:97:A6:E6:EB:77:16:1D:77:2C:21:14:84:89:C5:DB:6B:B5:A4:5C:67:4A
Alternative Names
5 domains

Security Configuration

TLS Protocols
TLS 1.2
Forward Secrecy
Limited (Check cipher configuration)
Warnings
  • • TLS 1.3 is not supported (recommended)

HTTP Security Headers

Status
Strict-Transport-Security
Excellent
max-age=31536000; includeSubDomains; preload
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer
Permissions-Policy
Present
vr=(), midi=()
Recommendations
  • • Add Content-Security-Policy header to prevent XSS attacks

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
letsencrypt.org ; validationmethods=dns-01,http-01 globalsign.com ; validationmethods=dns-01 cloudflare.com ; validationmethods=http-01 pki.goog ; validationmethods=dns-01,http-01
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • You have authorized 4 CAs - consider limiting to only the CAs you actively use
  • • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
  • • Consider adding 'issuewild' records to control wildcard certificate issuance