DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Detected Technologies

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

Certificate Information

Subject
CN=preplu.com
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
May 10, 2026
Valid Until
August 08, 2026 60 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
F4:1F:17:83:97:47:AB:E7:BC:10:43:21:FE:09:79:BC:5B:65:A1:1F:0C:74:16:6C:D1:02:A5:1E:77:19:CC:9C
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
xclassvn.bio *.xclassvn.bio

Other domains in certificate

4it.me *.4it.me *.api.4it.me *.app.4it.me *.devhome.4it.me *.domains.4it.me *.home.4it.me *.image.4it.me *.mail.4it.me *.mails.4it.me *.old.4it.me *.php.4it.me *.question.4it.me *.sa.4it.me *.todo.4it.me *.wuyishan.4it.me *.ww38.4it.me *.zabbix.4it.me
apogeetest.net *.apogeetest.net *.c03.apogeetest.net *.ww25.apogeetest.net *.ww38.apogeetest.net
av168y.com *.av168y.com *.ww25.av168y.com
*.25.av8av.com av8av.com *.av8av.com *.wvw.av8av.com *.ww25.av8av.com
avfls.makeup *.avfls.makeup *.bi.avfls.makeup *.buv.avfls.makeup *.dej.avfls.makeup *.dmi.avfls.makeup *.ww25.avfls.makeup
bdyka.xyz *.bdyka.xyz *.ww25.bdyka.xyz
bgwealth.live *.bgwealth.live
bosevyo.com *.bosevyo.com *.ww38.bosevyo.com
*.32.heiliaowang56273.buzz heiliaowang56273.buzz *.heiliaowang56273.buzz
*.desktop.homedetop.com homedetop.com *.homedetop.com *.ww11.homedetop.com
huaxi.live *.huaxi.live
*.b2b.lifetimemufflerbrake.com *.beta.lifetimemufflerbrake.com *.demo.lifetimemufflerbrake.com *.es.lifetimemufflerbrake.com lifetimemufflerbrake.com *.lifetimemufflerbrake.com *.magento.lifetimemufflerbrake.com *.new.lifetimemufflerbrake.com *.shop.lifetimemufflerbrake.com *.test.lifetimemufflerbrake.com *.ww25.lifetimemufflerbrake.com *.ww38.lifetimemufflerbrake.com *.www.lifetimemufflerbrake.com
*.books.palaustudio.com *.cdn.palaustudio.com *.hr.palaustudio.com *.mx.palaustudio.com *.news.palaustudio.com palaustudio.com *.palaustudio.com
pcx.bet *.pcx.bet
preplu.com *.preplu.com *.random.preplu.com
showbands.live *.showbands.live
*.billing.waclighitng.com *.jocuri.waclighitng.com *.map.waclighitng.com waclighitng.com *.waclighitng.com