DNS Gurus
Cached · just now
94/100 SECURITY SCORE

Certificate Information

Subject
CN=www.netzone.ch
Issuer
C=US, O=Let's Encrypt, CN=E7
Valid From
December 19, 2025
Valid Until
March 19, 2026 46 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
53:04:A0:13:5D:59:6F:13:1F:EA:DB:5A:4A:C2:19:78:9A:65:A3:FC:EE:96:86:4B:B0:7E:B4:70:9B:05:94:40
Alternative Names
33 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
Present
max-age=15552000;
Content-Security-Policy
Basic
default-src; child-src; frame-src; +7 more
X-Frame-Options
Excellent
deny
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin
Permissions-Policy
Present
accelerometer=(), camera=(), geolocation=(), gyroscope=(), magnetometer=(), microphone=(), payment=(), usb=()
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • Improve CSP by adding more specific directives and removing 'unsafe-inline'

CAA Records (Certificate Authority Authorization)

CAA Records
Configured (Restricts certificate issuance)
Current Issuer
Authorized (Matches CAA policy)
Authorized CAs
letsencrypt.org ; validationmethods=http-01; accounturi=https://acme-v02.api.letsencrypt.org/acme/acct/98543920 sectigo.com letsencrypt.org
Recommendations
  • • Consider using critical flag (flags=128) for stricter CAA enforcement
  • • Consider adding 'iodef' records to receive notifications about unauthorized certificate issuance attempts
  • • Consider adding 'issuewild' records to control wildcard certificate issuance