DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 1
Let's Encrypt logo Let's Encrypt Active incidents

Certificate Information

Subject
CN=opentennis.it
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
May 22, 2026
Valid Until
August 20, 2026 76 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
01:72:12:C1:13:76:53:EE:D6:A0:54:18:8E:0E:81:40:E8:72:4F:D5:48:28:DC:D4:0A:A5:79:4F:3C:79:CF:BC
Alternative Names
89 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
Missing
Not configured
Content-Security-Policy
Missing
Not configured Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Missing
Not configured
X-Content-Type-Options
Missing
Not configured
Referrer-Policy
Missing
Not configured
Permissions-Policy
Missing
Not configured
Recommendations
  • • Add Strict-Transport-Security header with max-age of at least 1 year
  • • 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

89 domains
499.com.cn *.499.com.cn *.mobile.499.com.cn *.sandbox.499.com.cn *.uuu.499.com.cn

Other domains in certificate

620008.top *.620008.top
*.anker-foundation.anker-foundations.com anker-foundations.com *.anker-foundations.com *.christianekrise.anker-foundations.com *.com.anker-foundations.com *.de.anker-foundations.com *.holz-turm.anker-foundations.com *.holzturm.anker-foundations.com *.uf-fundamente.anker-foundations.com
cudisusdt.com *.cudisusdt.com
drillrig.com.au *.drillrig.com.au *.ww25.drillrig.com.au
gesundes-holzminden.de *.gesundes-holzminden.de *.www.gesundes-holzminden.de
*.3rrcams.horningsc.co.uk horningsc.co.uk *.horningsc.co.uk
livingroute.com *.livingroute.com
*.6bb92418-eb9a-4a77-9199-29c8e9487f22.localdeeprag.info *.a.localdeeprag.info *.a42e3dfa-3e9d-480c-8c6d-de0ac68f725c.localdeeprag.info *.api.localdeeprag.info *.app.localdeeprag.info *.dev.localdeeprag.info localdeeprag.info *.localdeeprag.info *.www.localdeeprag.info
npettech.com *.npettech.com *.ww17.npettech.com
*.gateway.opentennis.it opentennis.it *.opentennis.it *.rdwa.opentennis.it *.sslvpn.opentennis.it *.vpn.opentennis.it
snb23.icu *.snb23.icu
*.com21www.tahoordanesh.com tahoordanesh.com *.tahoordanesh.com
*.jotti.virusscan.org virusscan.org *.virusscan.org *.www.virusscan.org *.wwww.virusscan.org
*.100f53f6-59ec-4a44-a10a-2de9f952586e.wiffi.at *.backup.wiffi.at *.beta.wiffi.at *.bgld.wiffi.at *.blog.wiffi.at *.cfazfs1.wiffi.at *.civerstore.wiffi.at *.cpanel.wiffi.at *.crdjgshop.wiffi.at *.crm.wiffi.at *.dbcd4be5-3410-4788-b80a-46a8d5aab972.wiffi.at *.demo.wiffi.at *.help.wiffi.at *.lernpalttform.wiffi.at *.lernplatform.wiffi.at *.lernplattform.wiffi.at *.m.wiffi.at *.mail.wiffi.at *.noe.wiffi.at *.service.wiffi.at *.shop.wiffi.at *.store.wiffi.at *.temp.wiffi.at *.test.wiffi.at *.tirol.wiffi.at wiffi.at *.wiffi.at *.wiki.wiffi.at *.www.wiffi.at
*.a.xfqna.bargains xfqna.bargains *.xfqna.bargains