Open
Cached
·
just now
91/100
SECURITY SCORE
Detected Technologies
Certificate Information
Subject
CN=zendesk.com
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
April 30, 2026
Valid Until
July 29, 2026
77 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
C4:4E:7B:DB:E3:F7:FA:A5:58:B0:60:C8:8B:9E:B1:D7:03:B5:C8:8D:D2:AB:AC:D5:07:18:C6:73:99:B2:E2:67
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
Weak
max-age=0; preload
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Present
same-origin
Permissions-Policy
Present
accelerometer=(), browsing-topics=(), camera=(); +15 more
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • 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