Open
Cached
·
just now
95/100
SECURITY SCORE
Certificate Information
Subject
CN=webmail.netzone.ch
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
December 04, 2025
Valid Until
March 04, 2026
31 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
20:95:22:A4:58:33:BF:77:33:E9:E2:45:34:F8:9D:D1:DB:A8:A9:71:06:15:4A:D0:F5:F5:25:C4:86:52:A9:38
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
Present
max-age=15552000;
Content-Security-Policy
Good
default-src; connect-src; script-src; +4 more
default-src 'self'; connect-src 'self' atmailopen.hostpark.net; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'; frame-ancestors 'none'; report-uri https://hostparknetzone.uriports.com/reports/report; report-to default
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
- • Strengthen CSP by removing 'unsafe-eval'
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
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