88/100 SECURITY SCORE

Certificate Information

Subject
CN=communications.calix.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
April 27, 2026
Valid Until
July 26, 2026 83 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
07:61:0D:1D:AA:72:40:D4:B6:BA:B5:3B:EB:41:90:BF:35:50:EE:4A:14:58:D1:E7:74:A9:5A:E5:0C:B1:E0:A1
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
Good
max-age=63072000; includeSubDomains
Content-Security-Policy
Basic
default-src; style-src; script-src; +1 more Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Missing
Not configured
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
  • Improve CSP by adding more specific directives and removing 'unsafe-inline'
  • 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
awstrust.com digicert.com letsencrypt.org ; validationmethods=http-01;accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/23216805
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