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Fix Windows Security Error 0x80070643 on Ubuntu Dual Boot - Port Still Open After UFW Deny: Common Fixes-Cloudflare Tunnel Step-by-Step Setup

Updated 2026-06-13 15:35:34macos-help

Fix Windows Security Error 0x80070643 on Ubuntu Dual Boot - Port Still Open After UFW Deny: Common Fixes-Cloudflare Tunnel Step-by-Step Setup

Prepare

Execute

Validate

Document

Operational follow-up

Record the exact option, command, or setting that changed the result.
Keep a rollback note if the workflow affects shared files or team settings.

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