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=fisf-fdu.cn
Issuer
C=US, O=Let's Encrypt, CN=R12
Valid From
May 21, 2026
Valid Until
August 19, 2026 79 days
Public Key
RSA 4096 bit Strong
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
27:62:46:AD:3A:49:01:5F:E7:2F:CE:B3:7B:FC:FF:AA:31:84:BC:90:D6:19:24:72:59:A4:BB:A1:F3:DD:18:79
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
sparrowsnest.net *.sparrowsnest.net *.mobileconnect.sparrowsnest.net

Other domains in certificate

attivisti.it *.attivisti.it *.owa.attivisti.it
*.a.dancetrading.com *.access.dancetrading.com *.autoconfig.dancetrading.com dancetrading.com *.dancetrading.com *.firewall.dancetrading.com *.forticlient.dancetrading.com *.fortigate.dancetrading.com *.fortinet.dancetrading.com *.gate.dancetrading.com *.outlook.dancetrading.com *.portal.dancetrading.com *.ra.dancetrading.com *.ravpn.dancetrading.com *.secure.dancetrading.com *.smtp.dancetrading.com *.ssl.dancetrading.com *.sslvpn.dancetrading.com *.webvpn.dancetrading.com
fidelitycanada.com *.fidelitycanada.com
*.001.fisf-fdu.cn *.15.fisf-fdu.cn *.6e.fisf-fdu.cn *.93xkm.fisf-fdu.cn *.ads.fisf-fdu.cn *.akesu.fisf-fdu.cn *.aliyun.fisf-fdu.cn *.antivirus.fisf-fdu.cn *.atlanta.fisf-fdu.cn *.avalon.fisf-fdu.cn *.b7.fisf-fdu.cn *.bar.fisf-fdu.cn *.eo93xkm.fisf-fdu.cn fisf-fdu.cn *.fisf-fdu.cn *.npz5ev.fisf-fdu.cn *.vpn.fisf-fdu.cn *.wwww.fisf-fdu.cn
flexipesa.com *.flexipesa.com
gatikdriver.com *.gatikdriver.com
gayinsarasota.com *.gayinsarasota.com
*.comraw.githubuserconent.com githubuserconent.com *.githubuserconent.com *.help.githubuserconent.com *.joomla.githubuserconent.com *.random.githubuserconent.com *.raw.githubuserconent.com *.ww25.githubuserconent.com
gruenanlage.net *.gruenanlage.net
haciendadonjuan.com *.haciendadonjuan.com
hilliardjaycees.org *.hilliardjaycees.org *.ut5nqm.hilliardjaycees.org
imrefluxstop.com *.imrefluxstop.com
kheloyar365.net *.kheloyar365.net *.m.kheloyar365.net *.ww38.kheloyar365.net
*.com.mlalonhossain.com *.edge.mlalonhossain.com mlalonhossain.com *.mlalonhossain.com
*.mx.tecnostore.co tecnostore.co *.tecnostore.co
*.fax.worththewaitranch.com *.mail.worththewaitranch.com *.pop.worththewaitranch.com worththewaitranch.com *.worththewaitranch.com *.www.worththewaitranch.com
*.w.youtuberobot.com *.ww38.youtuberobot.com youtuberobot.com *.youtuberobot.com