Open
Cached
·
just now
94/100
SECURITY SCORE
Certificate Information
Subject
CN=sylveos.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
November 14, 2025
Valid Until
February 12, 2026
50 days
Public Key
RSA
4096 bit
Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
5B:14:07:AE:39:1A:4C:58:FD:E1:7B:C5:15:E4:81:F0:BD:15:19:51:EB:18:D8:8B:57:D3:BF:A1:50:3A:73:17
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
default-src
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin-when-cross-origin
Permissions-Policy
Present
autoplay=(self "https://youtube.com" "https://www.facebook.com" "https://www.dailymotion.com" "https://www.vimeo.com"),fullscreen=(self "https://www.youtube.com" "https://www.facebook.com" "https://www.dailymotion.com" "https://www.vimeo.com"),geolocation=(self),accelerometer=(),ambient-light-sensor=(),battery=(),camera=(),display-capture=(),document-domain=(),encrypted-media=(),execution-while-not-rendered=(),execution-while-out-of-viewport=(),gamedpad=(),gyroscope=(),hid=(),identity-credentials-get=(),idle-detection=(),local-fonts=(),magnetometer=(),microphone=(),midi=(),payment=(),picture-in-picture=(),publickey-credentials-create=(),publickey-credentials-get=(),screen-wake-lock=(),serial=(),speaker-selection=(),storage-access=(),usb=(),xr-spatial-tracking=()
Recommendations
- • 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