DNS Gurus
Cached · just now
81/100 SECURITY SCORE

Certificate Information

Subject
CN=syncromsp.com
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
November 05, 2025
Valid Until
February 03, 2026 34 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
68:9C:CD:C5:88:F6:8B:07:3B:EB:53:02:5E:CA:0F:A7:2C:25:C5:8B:81:BA:7F:BE:87:08:E8:9D:4F:D4:86:F9
Alternative Names
5 domains

Security Configuration

TLS Protocols
TLS 1.1 TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)
Warnings
  • • TLS 1.1 is deprecated and should be disabled

HTTP Security Headers

Status
Strict-Transport-Security
Missing
Not configured
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • Add Content-Security-Policy header to prevent XSS attacks
  • • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
  • • 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
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
digicert.com ; cansignhttpexchanges=yes letsencrypt.org pki.goog ; cansignhttpexchanges=yes ssl.com comodoca.com
Wildcard CAs
comodoca.com digicert.com ; cansignhttpexchanges=yes letsencrypt.org pki.goog ; cansignhttpexchanges=yes ssl.com
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • You have authorized 5 CAs - consider limiting to only the CAs you actively use
  • • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts