DNS Gurus
Cached · just now
90/100 SECURITY SCORE

Detected Technologies

See all in URL Inspect 1
Let's Encrypt logo Let's Encrypt

Certificate Information

Subject
CN=teachus.net
Issuer
C=US, O=Let's Encrypt, CN=YE2
Valid From
September 13, 2026
Valid Until
December 12, 2026 55 days
Public Key
ECDSA 256 bit (P-256) Adequate
Signature Algorithm
ECDSA-SHA384
SHA-256 Fingerprint
AD:0B:D4:AF:7C:6A:FD:AE:E3:89:06:FA:0C:7E:B4:CC:DC:00:BD:92:12:FB:A1:86:62:EF:2E:37:60:6C:C5:CB
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
Excellent
max-age=31536000; includeSubDomains; preload
Content-Security-Policy
Missing
Not configured Analyze
Content-Security-Policy-Report-Only
Missing
Not configured Analyze
X-Frame-Options
Excellent
DENY
X-Content-Type-Options
Good
nosniff
Referrer-Policy
Good
strict-origin
Permissions-Policy
Present
geolocation=(), midi=(), sync-xhr=(); +6 more
Recommendations
  • • Add Content-Security-Policy header to prevent XSS attacks

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
seehotelpegasus.de *.seehotelpegasus.de

Other domains in certificate

adiwa.net *.adiwa.net
airguns.it *.airguns.it *.smtp.airguns.it *.www.airguns.it
alamotruckdrivingschool.com *.alamotruckdrivingschool.com *.cicd.alamotruckdrivingschool.com *.ww16.alamotruckdrivingschool.com
apostacerta.net *.apostacerta.net *.central.apostacerta.net *.com.apostacerta.net
calmacbookings.co.uk *.calmacbookings.co.uk *.m.calmacbookings.co.uk *.mail.calmacbookings.co.uk *.ns01.calmacbookings.co.uk *.ns2.calmacbookings.co.uk *.www.calmacbookings.co.uk
canarbank.com *.canarbank.com *.www.canarbank.com
deraliye.co.uk *.deraliye.co.uk
ecutuning.com.au *.ecutuning.com.au *.mailgw.ecutuning.com.au *.smtpauth.ecutuning.com.au
fairservice.com *.fairservice.com
fakeborder.com *.fakeborder.com
interiorconceptsfurniture.com *.interiorconceptsfurniture.com *.mailsrv.interiorconceptsfurniture.com *.store.interiorconceptsfurniture.com
*.canada.isidwith.com isidwith.com *.isidwith.com
*.mailserver.michelangelo.au michelangelo.au *.michelangelo.au
monister.com *.monister.com *.wildcard.monister.com *.x.monister.com
movieproduction.com.au *.movieproduction.com.au *.random.movieproduction.com.au
*.kr.multivax.com multivax.com *.multivax.com *.ww16.multivax.com *.ww17.multivax.com *.ww25.multivax.com *.ww38.multivax.com
mycreditrepair.co.uk *.mycreditrepair.co.uk
*.comwww.quaboagcountryclub.com quaboagcountryclub.com *.quaboagcountryclub.com
*.random.regrets.com.au regrets.com.au *.regrets.com.au
silahsilah.com *.silahsilah.com
*.kq0lhco4ueora8q.spruikleodacrilan.sbs *.random.spruikleodacrilan.sbs spruikleodacrilan.sbs *.spruikleodacrilan.sbs
teachus.net *.teachus.net *.ww25.teachus.net
trianglesurj.org *.trianglesurj.org *.ww16.trianglesurj.org *.ww25.trianglesurj.org *.www.trianglesurj.org
vinnyspizzafortbragg.com *.vinnyspizzafortbragg.com
werners.com *.werners.com *.www.werners.com
youth4pacific.org *.youth4pacific.org