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=dangthanh.com
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
April 18, 2026
Valid Until
July 17, 2026 66 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
8F:44:F2:9A:F7:B4:68:9A:02:9A:2B:CC:2C:86:A6:1D:4F:1B:4B:D8:EE:E4:89:F4:B2:79:8F:1F:2A:7A:27:D4
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 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

90 domains
mfrts.com *.mfrts.com *.staging.mfrts.com *.ywi.mfrts.com

Other domains in certificate

aaptip.org *.aaptip.org *.rgfn.aaptip.org *.ww25.aaptip.org
capitalgeoup.com *.capitalgeoup.com *.ww25.capitalgeoup.com
*.anyconnect.dangthanh.com *.asmtp.dangthanh.com *.barracuda.dangthanh.com *.clientesvpn.dangthanh.com *.connect.dangthanh.com *.correo.dangthanh.com dangthanh.com *.dangthanh.com *.east.dangthanh.com *.email.dangthanh.com *.exchange.dangthanh.com *.forum.dangthanh.com *.forums.dangthanh.com *.gateway.dangthanh.com *.imap.dangthanh.com *.m.dangthanh.com *.mail.dangthanh.com *.mail02.dangthanh.com *.mail7.dangthanh.com *.mailhost.dangthanh.com *.messagerie.dangthanh.com *.mmxogimap.dangthanh.com *.mobileconnect.dangthanh.com *.ms1.dangthanh.com *.mx01.dangthanh.com *.mx5.dangthanh.com *.officevpn.dangthanh.com *.out.dangthanh.com *.pbrand.dangthanh.com *.po.dangthanh.com *.portal.dangthanh.com *.posta.dangthanh.com *.pro1.dangthanh.com *.rds1.dangthanh.com *.rdweb.dangthanh.com *.relay.dangthanh.com *.remote.dangthanh.com *.remote2.dangthanh.com *.remoto.dangthanh.com *.secure.dangthanh.com *.ssl.dangthanh.com *.sslvpn.dangthanh.com *.sslvpn2.dangthanh.com *.sslvpn3.dangthanh.com *.studentsvpn.dangthanh.com *.vpn.dangthanh.com *.vpn2.dangthanh.com *.vpn3.dangthanh.com *.vpnssl.dangthanh.com *.webaccess.dangthanh.com *.webmail.dangthanh.com *.wildcard.dangthanh.com *.ww1.dangthanh.com *.ww16.dangthanh.com *.ww17.dangthanh.com *.ww25.dangthanh.com *.zmail.dangthanh.com
*.api.fapezza.com *.app.fapezza.com *.backend.fapezza.com *.dev.fapezza.com *.es.fapezza.com fapezza.com *.fapezza.com *.ftp.fapezza.com *.ns1.fapezza.com *.ns2.fapezza.com *.staging.fapezza.com *.ww103.fapezza.com *.ww7.fapezza.com
makoslotakses.info *.makoslotakses.info *.yzpsmimail.makoslotakses.info
sattamatkaold.com *.sattamatkaold.com *.ww38.sattamatkaold.com
*.id.volamhoainiem.mobi volamhoainiem.mobi *.volamhoainiem.mobi