Open
Cached
·
just now
76/100
SECURITY SCORE
Detected Technologies
Certificate Information
Subject
CN=makepostcards.com
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
April 07, 2026
Valid Until
July 06, 2026
23 days
Public Key
RSA
4096 bit
Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
1C:6B:5E:78:3E:4D:29:2D:63:42:BB:FE:FC:2C:FF:B8:66:96:4B:C8:B9:A0:2C:AD:DA:F1:3C:CF:E7:E6:59:3F
Alternative Names
Security Configuration
TLS Protocols
Forward Secrecy
Limited
(Check cipher configuration)
Warnings
- • TLS 1.3 is not supported (recommended)
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
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Add Content-Security-Policy header to prevent XSS attacks
- • Add Referrer-Policy header (recommended: strict-origin-when-cross-origin)
- • 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