Open Cached · just now
77/100 SECURITY SCORE

Certificate Information

Subject
CN=yulingo.app
Issuer
C=US, O=Google Trust Services, CN=WR3
Valid From
December 09, 2025
Valid Until
March 09, 2026 88 days
Public Key
RSA 2048 bit Adequate
Signature Algorithm
SHA256-RSA
SHA-256 Fingerprint
25:55:93:BE:2C:6B:47:3C:46:0F:59:18:4A:EE:40:A9:E7:BD:9F:F0:AA:E8:8F:23:7A:88:97:7E:17:21:85:2E
Alternative Names

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=31556926
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
  • 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)
  • 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

100 domains
ahldn.org

Other domains in certificate

app.4kweeks.com
dyn-links-uat.accelior.com
intento.ap1.com.br
www.awqati.org
barenderasmus.com
bashcreator.net
www.beansbybeans.com
brother-digital.com
centuriapicena.it
spm.cesargalicia.dev
www.cirasee.com
www.clevercorners.com
www.classifyme.co.ke
www.cofemacaqueta.com
thetamburger.com.tr
account.brightschool.com.ua
spiel.conexionberlin.com
daysi-alimso.crconsultorescolombia.com
app.prep.deliversense.com
devinireland.com
drishyam.org
h2solucoesemsaude.drtis.com.br
www.ductulator.com
elsazondemitierra.site
www.emergenssi.fi
www.enlinje.se
entertainingminds.co.uk
www.experify.io
portaldev.ezclo.net
fingam.ai
auth.fit18.com
www.fivetastes.ca
geagency.com
lebotaniste.getsquarefare.com
gmsdms.com
hanustransport.cz www.hanustransport.cz
healthtree.org
3yearplan.heartland.edu
hidroteklatino.com
hiphopandcode.com
homespotai.com
honto.com.au
hopperparts.com
www.ic-reader.com
ichef-co.com
inhalerschart.com
canon.inhalt.dk
irontemplarrecovery.com
student-kpl-stage-2.ischoolconnect.com
www.isonetwork.ir
jooon.xyz
klubsoft.com
testauth.koong.world
app.kubilang.it
liquidgov.org
tapthedifference.lotum.com
michaellemke.info
static.firebase.milkice.me
www.monadone.com
moulding-solutions.in
www.mtc.cc
it-school.murich.info
mxmummery.xyz
nakulkundra.com
nanointerfacegroup.com
napstjaertgaard.com
v1.nelkit.dev
link.neolight.live
www.netgrids.com
ninekd.co.uk
www.ohalloran.dev
admin.commit.outreach-dev.com
pandemiccondition.com
www.pippaspan.com
game.prestes.com
hq.prima.golf
feedback.raiderarts.net
web.rosivhub.com
sakasa.jp
salaoday.com.br
santosconsultor.com.br
seanjohn.de
www-dev.sokontokoro-factory.net
midi-sans-frontieres.squarepusher.net
www.taraleemason.com
www.tcwindowtint.com
www.thagomizer.com
www.thebuddypatch.com
theduncans.family
ixigo.visa2fly.com
virudhunagar.vishnutaxi.com
wanderingcastle.net
admin.wareclouds.app
watetenwevanavond.app
whiskybuddy.app
test.manager.woonig.app
www.wrandlv.com
yulingo.app