DNS Gurus
Cached · just now
76/100 SECURITY SCORE

Certificate Information

Subject
CN=yookyung.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
February 05, 2026
Valid Until
May 06, 2026 88 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
AF:DD:A8:9A:2F:A7:0D:CD:58:3F:96:F0:6E:55:F8:4E:47:42:20:84:83:BA:8D:4B:DA:06:04:4A:14:23:A5:CD
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
jaach.com *.jaach.com *.api.jaach.com *.backup.jaach.com *.hostmaster.jaach.com *.qpi.jaach.com *.test.jaach.com *.vpn.jaach.com

Other domains in certificate

airbnbcouponreddit.com *.airbnbcouponreddit.com *.ww38.airbnbcouponreddit.com
*.access.albek.com albek.com *.albek.com *.antispam.albek.com *.anyconnect.albek.com *.auth.albek.com *.backup.albek.com *.connectvpn.albek.com *.exchange.albek.com *.hostmaster.albek.com *.marketing.albek.com *.mobile.albek.com *.office.albek.com *.pop3.albek.com *.portal.albek.com *.rdp.albek.com *.rds.albek.com *.rdweb.albek.com *.remote.albek.com *.secure.albek.com *.smtp1.albek.com *.ssl.albek.com *.stg.albek.com *.uat.albek.com *.v2.albek.com *.vpn.albek.com *.vpn2.albek.com *.web.albek.com *.webconnect.albek.com
alugueldecarro.com *.alugueldecarro.com *.backup.alugueldecarro.com
auslands.com *.auslands.com *.ebay.auslands.com
*.avggm5vs9r.datafloww.xyz datafloww.xyz *.datafloww.xyz
edigo.com *.edigo.com
*.asa.hiddink.com hiddink.com *.hiddink.com *.zamid1-gp.hiddink.com
jami.es *.jami.es *.mail.jami.es *.mi.jami.es
*.mail.parcbotannia.info parcbotannia.info *.parcbotannia.info *.sitemap.parcbotannia.info *.sitemaps.parcbotannia.info *.www.parcbotannia.info
talvivaara.com *.talvivaara.com *.ww16.talvivaara.com
typeit.it *.typeit.it *.webdisk.typeit.it
*.integration.varzy.xyz *.m.varzy.xyz *.savarzy.varzy.xyz varzy.xyz *.varzy.xyz *.ww38.varzy.xyz
*.sport.x10tn.com *.staging.x10tn.com *.ww25.x10tn.com x10tn.com *.x10tn.com
*.kwid9.xn--vpn-ol9dw02ma.xyz xn--vpn-ol9dw02ma.xyz *.xn--vpn-ol9dw02ma.xyz
*.ead.yookyung.com *.qaypxdahnzww38.yookyung.com *.ww16.yookyung.com yookyung.com *.yookyung.com