Open
Cached
·
just now
86/100
SECURITY SCORE
Certificate Information
Subject
CN=mail.leb.services
Issuer
C=US, O=Let's Encrypt, CN=E8
Valid From
January 20, 2026
Valid Until
April 20, 2026
74 days
Public Key
ECDSA
256 bit
(P-256)
Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
A8:C1:8B:FF:3F:E9:24:EB:9A:CC:2D:7C:C1:F4:9D:AF:1D:FD:17:17:27:9D:6F:57:2E:67:C9:1C:06:07:CB:5C
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=15768000; includeSubdomains; preload
Content-Security-Policy
Basic
base-uri; connect-src; default-src; +8 more
base-uri 'self'; connect-src data: ws: wss: http: https: blob:; default-src 'self' 'unsafe-eval' data: blob: https://*.synology.com https://www.synology.cn/ https://help.synology.cn/; font-src 'self' data: https://*.googleapis.com https://*.gstatic.com https://fonts.gstatic.com https://*.gstatic.com; form-action 'self'; frame-ancestors 'self' https://files.leb.services https://lebuser.com; frame-src 'self' data: blob: https://*.synology.com https://*.synology.cn https://www.youtube.com http://www.youtube.com http://*.synology.com http://*.synology.cn http://global.synologydownload.com https://global.synologydownload.com; img-src 'self' data: blob: https://*.google.com https://*.googleapis.com http://*.googlecode.com https://*.gstatic.com https://global.download.synology.com https://maps.gstatic.com https://*.googleapis.com https://*.google.com https://i.ytimg.com https://*.ggpht.com https://*.gstatic.com https://*.googleapis.com https://*.google.com https://*.baidu.com http://*.baidu.com https://*.bdstatic.com https://*.bdimg.com *; media-src 'self' data: about: https://*.synology.com https://help.synology.cn; script-src 'self' 'unsafe-eval' data: blob: https://maps.google.com https://maps.googleapis.com https://ajax.googleapis.com https://help.synology.com https://help.synology.cn https://maps.google.com https://maps.googleapis.com https://*.google.com https://*.googleapis.com https://*.baidu.com http://*.baidu.com https://*.bdstatic.com https://*.bdimg.com; style-src 'self' 'unsafe-inline' https://*.googleapis.com https://fonts.googleapis.com https://*.googleapis.com https://api.map.baidu.com;
X-Frame-Options
Good
SAMEORIGIN
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Improve CSP by adding more specific directives and removing 'unsafe-inline'
- • 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
Not Configured
(Any CA can issue certificates)
CAA Issues
- • No CAA records configured - any CA can issue certificates
Recommendations
- • Implement CAA records to restrict which CAs can issue certificates for your domain
- • This adds an extra layer of security against unauthorized certificate issuance
- • Example: Add CAA record 'example.com. CAA 0 issue "letsencrypt.org"'
- • Consider adding 'iodef' record to receive security incident reports