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=arsenic.au
Issuer
C=US, O=Let's Encrypt, CN=R13
Valid From
February 14, 2026
Valid Until
May 15, 2026 88 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
A3:92:FC:8D:73:0A:D6:BD:CB:51:AC:A5:52:68:15:94:F2:6A:AE:3E:C0:42:59:A3:38:46:7E:3C:55:57:CE:32
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
closty.com *.closty.com *.admin.closty.com *.app.closty.com *.b.closty.com *.blog.closty.com *.cdn.closty.com *.co.closty.com *.dc3.closty.com *.delta.closty.com *.demos.closty.com *.dev.closty.com *.download.closty.com *.en.closty.com *.es.closty.com *.extranet.closty.com *.g2.closty.com *.hosting.closty.com *.m.closty.com *.search.closty.com *.stream2.closty.com *.users.closty.com *.videos.closty.com *.wiki.closty.com *.wp.closty.com

Other domains in certificate

arsenic.au *.arsenic.au
*.aaliyahaddison.lidyadanira.sbs *.aaliyahtyesha.lidyadanira.sbs *.abbykassandra.lidyadanira.sbs *.alanarylee.lidyadanira.sbs *.alicetess.lidyadanira.sbs *.arianayaritza.lidyadanira.sbs *.aylatatum.lidyadanira.sbs *.beatriceguadalupe.lidyadanira.sbs *.betsynathalie.lidyadanira.sbs *.blancabrianna.lidyadanira.sbs *.blancameranda.lidyadanira.sbs *.camillekaila.lidyadanira.sbs *.christietania.lidyadanira.sbs *.claudiacarrie.lidyadanira.sbs *.colleenxiomara.lidyadanira.sbs *.dejamarina.lidyadanira.sbs *.devanapril.lidyadanira.sbs *.dorothykhadijah.lidyadanira.sbs *.elizatalia.lidyadanira.sbs *.emiliejade.lidyadanira.sbs *.gabrielakira.lidyadanira.sbs *.gabrielpaula.lidyadanira.sbs *.ginagraciela.lidyadanira.sbs *.haleytaryn.lidyadanira.sbs *.janettesally.lidyadanira.sbs *.jenniedominique.lidyadanira.sbs *.jessicamariah.lidyadanira.sbs *.jocelynsusana.lidyadanira.sbs *.karanikki.lidyadanira.sbs *.katebridgette.lidyadanira.sbs *.katelynnannette.lidyadanira.sbs *.keilakyra.lidyadanira.sbs *.keishamaria.lidyadanira.sbs *.laylabrandy.lidyadanira.sbs *.leannwendy.lidyadanira.sbs *.lianajosephine.lidyadanira.sbs *.lidiacheyanne.lidyadanira.sbs lidyadanira.sbs *.lidyadanira.sbs *.lilyjane.lidyadanira.sbs *.lindsaydakota.lidyadanira.sbs *.luzangel.lidyadanira.sbs *.maceyjoana.lidyadanira.sbs *.mail.lidyadanira.sbs *.marielayasmin.lidyadanira.sbs *.marisoldarlene.lidyadanira.sbs *.marthajuana.lidyadanira.sbs *.mayabrittni.lidyadanira.sbs *.molliemicah.lidyadanira.sbs *.monicameranda.lidyadanira.sbs *.monicashayla.lidyadanira.sbs *.noemichloe.lidyadanira.sbs *.patriciaana.lidyadanira.sbs *.paytonelisha.lidyadanira.sbs *.samanthaingrid.lidyadanira.sbs *.selenamargarita.lidyadanira.sbs *.shakiraalondra.lidyadanira.sbs *.tatianahalle.lidyadanira.sbs *.theresamallory.lidyadanira.sbs *.virginiaamani.lidyadanira.sbs
*.ww25.yadongkorea.re yadongkorea.re *.yadongkorea.re