HSTS

为何重要

HSTS tells browsers to always use HTTPS for your site, which prevents downgrade attacks and saves a redirect.

如何修复

1. Once HTTPS works everywhere, send Strict-Transport-Security: max-age=31536000.

使用以下工具检查

• Security Headers Checker – Grade a site’s HTTP security headers (CSP, HSTS, X-Frame-Options and more).

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