DNS Gurus
Cached · just now
92/100 SECURITY SCORE

Certificate Information

Subject
CN=overleaf.com
Issuer
C=US, O=Google Trust Services, CN=WR3
Valid From
January 23, 2026
Valid Until
April 23, 2026 87 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
C5:9F:5B:36:5F:6E:28:D0:A6:B3:46:A9:86:14:5A:99:CD:3F:94:62:65:9B:AB:6E:12:06:A8:D7:F1:AB:6B:FF
Alternative Names
20 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
Basic
script-src; object-src; base-uri
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
origin-when-cross-origin
Permissions-Policy
Present
accelerometer=(), attribution-reporting=(), browsing-topics=(), camera=(), display-capture=(), encrypted-media=(), gamepad=(), geolocation=(), gyroscope=(), hid=(), identity-credentials-get=(), idle-detection=(), local-fonts=(), magnetometer=(), microphone=(), midi=(), otp-credentials=(), payment=(), picture-in-picture=(), screen-wake-lock=(), serial=(), storage-access=(), usb=(), window-management=(), xr-spatial-tracking=(), autoplay=(self "https://videos.ctfassets.net"), fullscreen=(self)
Recommendations
  • • Consider adding 'preload' to HSTS for maximum security
  • • Improve CSP by adding more specific directives and removing 'unsafe-inline'

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