Open
Cached
·
just now
92/100
SECURITY SCORE
Certificate Information
Subject
CN=vyuka.jakubforman.eu
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
November 13, 2025
Valid Until
February 11, 2026
77 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
90:2A:4D:4F:1E:82:A1:2D:EC:D2:22:F1:89:1D:61:FA:1C:96:C0:7D:3F:9B:16:7F:D8:80:98:E4:44:FB:25:C8
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=31536000; includeSubDomains; preload
Content-Security-Policy
Basic
script-src; connect-src; font-src; +7 more
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https://notion-production-snapshots-2.s3.us-west-2.amazonaws.com https://local-workers-code-bundles.s3.us-west-2.amazonaws.com https://dev-space-euc1-0001-workers-code-bundles.s3.eu-central-1.amazonaws.com https://dev-space-usw2-0001-workers-code-bundles.s3.us-west-2.amazonaws.com https://dev-space-usw2-0002-workers-code-bundles.s3.us-west-2.amazonaws.com https://stg-space-usw2-0001-workers-code-bundles.s3.us-west-2.amazonaws.com https://prod-space-euc1-0001-workers-code-bundles.s3.eu-central-1.amazonaws.com https://prod-space-usw2-0001-workers-code-bundles.s3.us-west-2.amazonaws.com https://prod-space-usw2-0002-workers-code-bundles.s3.us-west-2.amazonaws.com https://prod-space-usw2-0003-workers-code-bundles.s3.us-west-2.amazonaws.com https://prod-space-usw2-0004-workers-code-bundles.s3.us-west-2.amazonaws.com https://file.notion.so notion://file.notion.so https://www.notion.com https://calendar.notion.so;font-src 'self' data: https://cdnjs.cloudflare.com https://cdn.jsdelivr.net 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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
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • 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