SSL Verification Bypassed
The server's SSL certificate could not be verified. The analysis was completed using insecure mode. Data may be less reliable.
Reason:
Hostname Mismatch - certificate is issued for analytics.brian.study, app.brian.study, brian.study, www.brian.study, not for prod.brian.study
Open
Cached
·
just now
89/100
SECURITY SCORE
Certificate Information
Subject
CN=brian.study
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
November 25, 2025
Valid Until
February 23, 2026
39 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
7F:66:7B:3D:00:61:6C:4C:0E:8E:00:2C:71:65:02:65:C1:76:5A:95:BD:09:3D:02:11:AD:F3:83:CC:11:E3:4D
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
Present
max-age=31536000
Content-Security-Policy
Strong
font-src; script-src; style-src; +8 more
font-src *; script-src 'self' https://maps.google.com https://accounts.google.com 'sha256-9uFLu5CG8mWlvx0LK6lgendCxUX57TuWk3wkgZpBeWU=' 'sha256-isH538cVBUY8IMlGYGbWtBwr+cGqkc4mN6nLcA7lUjE=' 'sha256-3N2Z+Nu++/yNMVHIl863JigVmt2Nr9gt2doEMJT2Wzk='; style-src 'self' 'nonce-kPr63KoBgV' https://accounts.google.com; manifest-src 'self'; connect-src 'self' https://accounts.google.com metabase.us10.list-manage.com ; img-src * 'self' data:; frame-src 'self' youtube.com *.youtube.com youtu.be *.youtu.be loom.com *.loom.com vimeo.com *.vimeo.com docs.google.com calendar.google.com airtable.com *.airtable.com typeform.com *.typeform.com canva.com *.canva.com codepen.io *.codepen.io figma.com *.figma.com grafana.com *.grafana.com miro.com *.miro.com excalidraw.com *.excalidraw.com notion.com *.notion.com atlassian.com *.atlassian.com trello.com *.trello.com asana.com *.asana.com gist.github.com linkedin.com *.linkedin.com twitter.com *.twitter.com x.com *.x.com; default-src 'none'; media-src www.metabase.com; child-src 'self' https://accounts.google.com; frame-ancestors 'none';
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
- • 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