Open
Cached
·
just now
94/100
SECURITY SCORE
Certificate Information
Subject
CN=smartb.city
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
September 28, 2025
Valid Until
December 27, 2025
54 days
Public Key
ECDSA
384 bit
(P-384)
Strong
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
17:60:C8:F9:90:6C:77:9C:25:C4:ED:B9:F8:3C:EB:ED:0F:95:23:DA:A9:81:50:24:B4:43:D9:EA:B1:CD:A1:CE
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
Missing
Not configured
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin
Permissions-Policy
Present
geolocation=(),midi=(),sync-xhr=(),microphone=(),camera=(),magnetometer=(),gyroscope=(),fullscreen=(self),payment=()
Recommendations
- • Add Content-Security-Policy header to prevent XSS attacks
CAA Records (Certificate Authority Authorization)
CAA Records
Configured
(Restricts certificate issuance)
Current Issuer
Authorized
(Matches CAA policy)
Authorized CAs
Recommendations
- • Consider using critical flag (flags=128) for stricter CAA enforcement
- • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
- • Consider adding 'issuewild' records to control wildcard certificate issuance