3X-UI VPS

Deploy 3X-UI on a VPS with the panel and subscription server bound to loopback, ufw allowing only SSH/HTTP/HTTPS, nginx on public 80/443, and one VLESS + XHTTP transport routed through nginx.

This skill is manual-first because it mutates remote infrastructure. Invoke it only when the user explicitly asks to deploy, repair, harden, or update a VPS.

Hard rule

• All server-side configuration must be executed only through the bundled scripts in this skill.
• Do not create or edit remote configs manually over SSH, do not run ad-hoc heredocs on the server, and do not "quick-fix" nginx, Docker, ACME, or 3X-UI by hand.
• Read-only inspection commands are allowed for diagnosis.
• If a script fails because the host is in an unexpected state, stop changing the server, patch the relevant script locally in this skill, and rerun the script.
• The manual fallback in this skill is for the 3X-UI panel UI only. It is not permission to mutate server files manually.

Inputs

Collect these before doing any work: