DNS Gurus
Cached · just now
88/100 SECURITY SCORE

Certificate Information

Subject
CN=web.app
Issuer
C=US, O=Google Trust Services, CN=WR4
Valid From
October 28, 2025
Valid Until
January 26, 2026 24 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
C4:13:E4:A6:37:EB:55:37:7A:20:18:54:FC:20:22:D9:CE:EA:44:FE:F6:06:A0:6E:2F:CB:E1:76:BA:9B:A0:2A
Alternative Names
2 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
Excellent
max-age=31556926; includeSubDomains; preload
Content-Security-Policy
Weak
form-action; object-src; frame-ancestors; +2 more
X-Frame-Options
Excellent
deny
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
origin-when-cross-origin
Permissions-Policy
Present
accelerometer=(),ambient-light-sensor=(),autoplay=(self),battery=(),camera=(self),display-capture=(*),document-domain=(),encrypted-media=(),fullscreen=(self),gamepad=(),geolocation=(self),gyroscope=(self),layout-animations=(self),legacy-image-formats=(self),magnetometer=(),microphone=(*),midi=(),oversized-images=(self),payment=(),picture-in-picture=(self),publickey-credentials-get=(),speaker-selection=(),sync-xhr=(self),unoptimized-images=(self),unsized-media=(self),usb=(),screen-wake-lock=(),web-share=(),xr-spatial-tracking=()
Recommendations
  • • Significantly strengthen CSP directives

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

2 domains
web.app *.web.app