Open
Cached
·
just now
94/100
SECURITY SCORE
Certificate Information
Subject
CN=docs.bostonmit.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
December 11, 2025
Valid Until
March 11, 2026
54 days
Public Key
RSA
4096 bit
Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
42:B6:4B:94:7D:A2:18:B6:C3:75:4C:40:B0:05:5D:9D:50:DD:EC:4F:3D:66:E7:32:FE:5F:15:78:D3:F8:30:7F
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
Excellent
max-age=31556952; includeSubDomains; preload
Content-Security-Policy
Good
default-src; font-src; object-src; +6 more
default-src 'self'; font-src 'self' https: data:; object-src 'none'; form-action 'self' https:; img-src 'self' https: blob: data: https://img.icons8.com; connect-src 'self' https://api.mapbox.com https://events.mapbox.com https://s3.wasabisys.com https://bmithudu.s3.wasabisys.com https://docs.bostonmit.com; frame-src https://www.youtube.com https://www.loom.com https://viewer.diagrams.net https://scribehow.com https://app.tango.us https://player.vimeo.com https://widget.canny.io https://lucid.app https://*.wasabisys.com https://www.canva.com https://*.sharepoint.com https://*.brightgauge.co https://www.figma.com https://*.figma.com https://maps.google.com https://www.google.com https://docs.google.com https://www.facebook.com https://www.linkedin.com https://app.rewst.io https://rewst.us.auth0.com https://api.mapbox.com https://bmithudu.s3.wasabisys.com https://docs.bostonmit.com; script-src 'self' blob: https://ajax.cloudflare.com https://canny.io/sdk.js https://api.duosecurity.com https://platform.twitter.com https://canvasjs.com https://stackpath.bootstrapcdn.com 'unsafe-inline'; style-src 'self' 'unsafe-inline' blob: https://stackpath.bootstrapcdn.com
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Missing
Not configured
Recommendations
- • Strengthen CSP by removing 'unsafe-eval'
- • 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