HTTP Headers: ru.wikipedia.org

accept-ch
accept-ranges
age
cache-control
content-encoding
content-language
content-length
content-security-policy
content-security-policy-report-only
content-type
date
last-modified
nel
report-to
server
server-timing
set-cookie
strict-transport-security
vary
x-analytics
x-cache
x-cache-status
x-client-ip
x-content-type-options
x-request-id

Strict-Transport-Security (HSTS) forces browsers to use HTTPS. Content-Security-Policy (CSP) prevents XSS attacks by controlling which resources can load. X-Content-Type-Options stops MIME-type sniffing. X-Frame-Options blocks clickjacking by preventing iframe embedding.

ru.wikipedia.org's security score of 60/100 reflects how many of these protective headers are configured. Higher scores indicate better defense against common web attacks.