Open
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just now
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SECURITY SCORE
Certificate Information
Subject
CN=klepocol.cz
Issuer
C=US, O=Google Trust Services, CN=WR3
Valid From
December 11, 2025
Valid Until
March 11, 2026
70 days
Public Key
RSA
2048 bit
Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
C2:4D:94:C3:1B:1F:B7:D9:FA:CE:EF:18:7C:50:1D:84:0A:B7:85:65:E0:38:1A:EE:51:DD:C1:16:F6:8A:1C:94
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=31556926
Content-Security-Policy
Missing
Not configured
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
- • Increase HSTS max-age to at least 1 year and add includeSubDomains
- • Add Content-Security-Policy header to prevent XSS attacks
- • Add X-Frame-Options: DENY or SAMEORIGIN to prevent clickjacking
- • Add X-Content-Type-Options: nosniff
- • 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
Subject Alternative Names
100 domains
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klepocol.cz
team-performance.lernit.app
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app1.letsaspiro.com
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localperfectcleaners.co.uk
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www.nilssimons.me
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gimnasiomineral.turnosweb.app
sennin.turnosweb.app
github-search.vchebotarev.dev
videogym.club
visualist.app
whosaidit.live
yaird.com
nurmahal.ytalize.com
Other domains in certificate