DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Certificate Information

Subject
CN=softwaretutoriais.xyz
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
December 22, 2025
Valid Until
March 22, 2026 38 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
B2:43:9D:3A:F2:A1:4D:BA:1B:45:39:A4:E7:0F:F2:1D:1C:71:87:FE:3B:FF:AF:5F:C6:DD:8E:74:8A:CE:1B:CA
Alternative Names
90 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
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

90 domains
mercadoibre.com *.mercadoibre.com *.admin.mercadoibre.com *.com.mercadoibre.com *.org.mercadoibre.com *.us.mercadoibre.com *.vc.mercadoibre.com

Other domains in certificate

1stchoicefacilities.co.uk *.1stchoicefacilities.co.uk *.ww25.1stchoicefacilities.co.uk
biquge.bio *.biquge.bio *.preprod-analytics.biquge.bio *.superset.biquge.bio
*.admin.cgcovid19.in *.center.cgcovid19.in cgcovid19.in *.cgcovid19.in *.epass.cgcovid19.in *.gwjewvpn.cgcovid19.in *.homeisolation.cgcovid19.in *.hospital.cgcovid19.in *.reg.cgcovid19.in *.test.cgcovid19.in
datatellme.com *.datatellme.com *.ww25.datatellme.com
domlepen-cpu.click *.domlepen-cpu.click *.ww25.domlepen-cpu.click
*.api.ismstruste.com ismstruste.com *.ismstruste.com
*.cnwww.mld168.com mld168.com *.mld168.com *.ww25.mld168.com *.ww38.mld168.com
muastudios.pl *.muastudios.pl *.website.muastudios.pl
netakad.com *.netakad.com
*.app.orangeboost.xyz orangeboost.xyz *.orangeboost.xyz
*.a0b89db5-495e-4986-b38a-bda23691e7a1.raedesign.xyz *.admin.raedesign.xyz *.api.raedesign.xyz *.app.raedesign.xyz *.backend.raedesign.xyz *.d.raedesign.xyz *.dev.raedesign.xyz raedesign.xyz *.raedesign.xyz *.sitemap.raedesign.xyz *.staging.raedesign.xyz *.ww1.raedesign.xyz *.ww25.raedesign.xyz *.ww7.raedesign.xyz *.ww99.raedesign.xyz *.www.raedesign.xyz
*.jcbotpai.redesfollows.fun redesfollows.fun *.redesfollows.fun
*.com.salondirectgroup.co.uk salondirectgroup.co.uk *.salondirectgroup.co.uk *.test.salondirectgroup.co.uk
*.1.seiyaa-shizuoka.site *.25.seiyaa-shizuoka.site *.28daed5b-ff00-4f7d-b9b2-6311ffd00c3f.seiyaa-shizuoka.site *.38.seiyaa-shizuoka.site *.map.seiyaa-shizuoka.site *.mta-sts.seiyaa-shizuoka.site seiyaa-shizuoka.site *.seiyaa-shizuoka.site *.sitemap.seiyaa-shizuoka.site *.sitemaps.seiyaa-shizuoka.site *.ww1.seiyaa-shizuoka.site *.ww25.seiyaa-shizuoka.site *.ww38.seiyaa-shizuoka.site
softwaretutoriais.xyz *.softwaretutoriais.xyz
*.home.theannaedit.site theannaedit.site *.theannaedit.site
*.mail.triel.eu triel.eu *.triel.eu