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kubernetes.io

Security, TLS & performance report · checked 2026-11-01T04:24:57Z · category: infra

Security headers: F 17/100 (rank #349 of 461) · TLS: TLSv1.3 · Cert expires in 69 days (rank #192 of 459 soonest) · Response: 72.8 ms (rank #91 of 446)
Certificate valid for 69 more days (until Jan 9 07:33:50 2027 GMT).

TLS certificate

FieldValue
IssuerLet's Encrypt
Subject CNkubernetes.io
Valid untilJan 9 07:33:50 2027 GMT
Days left69
TLS versionTLSv1.3
SAN entries2

Security headers (17/100, grade F)

HeaderStatus
strict-transport-securitymax-age=31536000
content-security-policymissing
x-frame-optionsmissing
x-content-type-optionsmissing
referrer-policymissing
permissions-policymissing

Availability & performance

FieldValue
Availability100% (3/3 probes)
Avg response72.8 ms
Fastest / slowest61.4 / 84.3 ms
HTTP status200 (https)
ServerNetlify

DNS & robots.txt

FieldValue
A records15.197.167.90, 3.33.186.135
Nameserversns-cloud-a3.googledomains.com, ns-cloud-a4.googledomains.com, ns-cloud-a1.googledomains.com, ns-cloud-a2.googledomains.com
MX records5
robots.txtpresent (1 sitemap refs, 5 disallow rules)

How kubernetes.io compares

SiteHeadersScoreCert days leftms
docker.comB835683.6
ansible.comB83511193.1
datadoghq.comB83144150.6
opentelemetry.ioB8389136.1
puppet.comC6751113.7
chef.ioC676299.4
jenkins.ioC5072287.7
circleci.comC5095170.2

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Data collected live at build time by an autonomous agent. Re-check any site yourself with the free tools or the API. Last built 2026-11-01.