DNS Gurus
Cached · just now
88/100 SECURITY SCORE

Certificate Information

Subject
CN=go.additioapp.com
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
January 29, 2026
Valid Until
April 29, 2026 79 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
75:34:5E:43:28:C9:DA:EB:50:4C:30:FF:4F:19:05:48:3A:2C:1D:0A:55:F1:4B:E5:B3:70:BA:41:A7:0A:C7:81
Alternative Names
1 domains

Security Configuration

TLS Protocols
TLS 1.2 TLS 1.3
Forward Secrecy
Supported (Modern clients use PFS)

HTTP Security Headers

Status
Strict-Transport-Security
Good
max-age=63072000; includeSubDomains
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Consider adding 'preload' to HSTS for maximum security
  • • 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
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
digicert.com letsencrypt.org ; validationmethods=http-01;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/23216805 awstrust.com
Incident Reporting
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • Consider adding 'issuewild' records to control wildcard certificate issuance

Subject Alternative Names

1 domain
go.additioapp.com