DNS Gurus
Cached · just now
79/100 SECURITY SCORE

Certificate Information

Subject
CN=imperva.com
Issuer
C=BE, O=GlobalSign nv-sa, CN=GlobalSign Atlas R3 DV TLS CA 2026 Q1
Valid From
January 21, 2026
Valid Until
July 20, 2026 164 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
02:FB:83:95:90:B2:B0:78:D8:FD:86:69:F5:02:CA:1E:6B:5E:0B:DB:E2:83:6C:04:36:5A:6A:FF:7A:86:AB:A2
Alternative Names
96 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
Present
max-age=15768000; preload
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
Present
browsing-topics=()
Recommendations
  • • Increase HSTS max-age to at least 1 year and add includeSubDomains
  • • 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)

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

96 domains
hmhco.com *.hmhco.com cert-staging.hmhco.com cert-waf.hmhco.com cert.hmhco.com cs41sf.hmhco.com hapi.hmhco.com na49sf.hmhco.com papi.hmhco.com prod-staging.hmhco.com *.cert.hmhco.com *.tgds.hmhco.com *.cert.ips-nonprod.hmhco.com *.cert.webnp.hmhco.com *.int.tsg.hmhco.com *.prod.ips-prod.hmhco.com

Other domains in certificate

channelone.com *.channelone.com pre.channelone.com
fandpleveledbooks.com *.fandpleveledbooks.com
demo-resources.fountasandpinnell.com digital.fountasandpinnell.com fountasandpinnell.com *.fountasandpinnell.com fpblog.fountasandpinnell.com resources.fountasandpinnell.com
analytics-cert.gogetwaggle.com analytics.gogetwaggle.com gogetwaggle.com *.gogetwaggle.com instruct-cert.gogetwaggle.com instruct.gogetwaggle.com practice-cert.gogetwaggle.com practice.gogetwaggle.com securedirectsync.gogetwaggle.com www.gogetwaggle.com
gomathacademy.com *.gomathacademy.com
authors.heinemann.com blog.heinemann.com *.cert.heinemann.com *.cert.webnp.heinemann.com *.demo.heinemann.com digital-fountasandpinnell.heinemann.com fandpleveledbooks.heinemann.com fountasandpinnell.heinemann.com fpdms.heinemann.com heinemann.com *.heinemann.com ltl.heinemann.com mosaic.heinemann.com myproducts.heinemann.com onlinepd.heinemann.com pdhandouts.heinemann.com *.prod.webpr.heinemann.com resources-fountasandpinnell.heinemann.com sample.heinemann.com searchit.heinemann.com www.heinemann.com
hmhbooks.com *.hmhbooks.com
*.ep.hmhpub.com *.hmhpub.com
*.hrw.com
imperva.com
listeningtolearn.com *.listeningtolearn.com pilot-qa.listeningtolearn.com *.pilot-qa.listeningtolearn.com pilot.listeningtolearn.com *.pilot.listeningtolearn.com
*.cert.mapnwea.org *.mapnwea.org
mathsolutions.com *.mathsolutions.com www.mathsolutions.com
*.cms.nwea.io
access.auth.nwea.org *.auth.perf.nwea.org *.cert.nwea.org *.cms-dev.nwea.org *.edr00.slkcut01.nwea.org *.nwea.org *.perf.nwea.org *.ptldor02.nwea.org *.state.nwea.org
*.nwea.us
regieroutman.com *.regieroutman.com
serravallostrategies.com *.serravallostrategies.com www.serravallostrategies.com
thinkcentral.com *.thinkcentral.com
*.unitsofstudy.com