Open
Cached
·
just now
91/100
SECURITY SCORE
Detected Technologies
Certificate Information
Subject
CN=byte.nl
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
April 16, 2026
Valid Until
July 15, 2026
77 days
Public Key
ECDSA
384 bit
(P-384)
Strong
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
1A:2C:05:89:83:AC:1D:5E:8D:FC:85:A7:10:4C:6F:BE:DD:7D:2E:36:43:AA:DC:10:6D:2F:4B:73:5C:52:E6:96
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
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
no-referrer-when-downgrade
Permissions-Policy
Present
midi=(), sync-xhr=(), microphone=(); +4 more
Recommendations
- • Add Content-Security-Policy header to prevent XSS attacks
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