xray-core 26.9.9 dropped finalmask.quicParams.udpHop for the client-only
"udphop" UDP mask {mode, interval, remoteIPs, remotePorts}. The panel kept
writing the old key, so hysteria/xhttp outbounds and JSON-subscription
clients silently stopped hopping ports.
An inbound keeps quicParams.udpHop: it is panel metadata advertised as the
link's mport, and a udphop mask on a listener fails with "udphop: client
only". The conversion (maskcompat.UpgradeLegacyUDPHop, intervalRemote mode)
runs only where a client config is produced:
- UDPHopClientMaskFix seeder over hosts, sub-JSON finalmask, cached
outbound-subscription outbounds and template outbounds (never inbounds);
- GetXrayConfig heals template outbounds at build time;
- the JSON subscription upgrades each generated client stream;
- the Go and frontend link importers upgrade a legacy fm= param.
The finalmask editor gains a side prop: the client side lifts the dead key
on mount and offers a udphop mask editor (also for xhttp's HTTP/3 dial);
the inbound side keeps the UDP Hop switch, labelled as advertised.
3x-ui Documentation
The official documentation and product site for 3x-ui — an advanced web panel for managing Xray-core servers.
Overview
This directory (docs/ in the 3x-ui monorepo) contains
the source for docs.sanaei.dev — a static-first documentation and
marketing site built with Fumadocs on Next.js. It has no backend,
no database, and no auth: every page is prerendered and every tool runs entirely in the
browser.
What's inside
The documentation walks you through 3x-ui from first install to day-to-day operation:
- Getting Started — installation, first login, and updating or uninstalling the panel.
- Configuration — the panel, inbounds, REALITY, transports, clients, subscriptions, and share links.
- Operations — reverse proxy, multi-node setups, outbounds & routing, backup/restore, Telegram and Discord bots, and security.
- Reference — environment variables, the database, ports & firewall, and the HTTP API.
- Help — troubleshooting, FAQ, migration, and how to contribute.
Interactive tools
The site ships with in-browser helpers that generate configuration for you — no data ever leaves your browser:
| Tool | What it does |
|---|---|
| REALITY Config Generator | Build a valid REALITY inbound configuration. |
| Share Link Inspector | Decode and inspect vless:// / vmess:// share links. |
| Install Command Builder | Assemble the right install command for your setup. |
| Reverse Proxy Generator | Generate reverse-proxy configs (Nginx / Caddy). |
| Protocol Wizard | Pick and configure the right protocol for your needs. |
| Firewall Rules Generator | Produce firewall rules for your ports. |
Tech stack
| Layer | Technology |
|---|---|
| Framework | Next.js 16 (App Router) · React 19 |
| Docs | Fumadocs (-ui / -core / -mdx) |
| Styling | Tailwind CSS v4 |
| Search | Orama static index |
| Language | TypeScript (strict) |
| Tests | Vitest for the pure lib/xray logic |
| Tooling | pnpm · oxlint · oxfmt |
Quick start
This project uses pnpm (npm lockfiles are gitignored). Run everything
from the docs/ directory:
cd docs
pnpm install
pnpm dev # http://localhost:3000
Useful scripts:
| Script | Description |
|---|---|
pnpm dev |
Start the dev server |
pnpm build |
Production build (also typechecks) |
pnpm typecheck |
Generate MDX/route types and tsc --noEmit |
pnpm lint |
Run oxlint (.oxlintrc.json) |
pnpm test |
Run unit tests (Vitest) |
See CONTRIBUTING.md for the full list and project conventions.
Project structure
app/ # Next.js App Router — layouts, home, docs, OG images, search, llms.txt
components/ # React components — interactive tools, home sections, MDX bindings
content/docs/ # MDX documentation, one folder per locale (en · fa · ru · zh)
lib/ # source config, i18n, GitHub stats, and the unit-tested lib/xray logic
public/ # static assets — logos, favicon, openapi.json, CNAME
scripts/ # build-time scripts (API reference generation)
source.config.ts # Fumadocs MDX schema & collection config
next.config.mjs # Next.js config (static-export gating)
proxy.ts # i18n middleware
Internationalization
Documentation is authored in English. Persian (fa, RTL), Russian (ru), and
Chinese (zh) locales are wired up; untranslated pages fall back to English so they
never 404. English URLs are unprefixed; other locales live under /fa, /ru, /zh.
Deployment
The site builds for two targets:
- Vercel / Node —
pnpm build(static search index + prerendered OG images). - GitHub Pages (static export) —
DEPLOY_TARGET=static pnpm build→out/.
Contributing
Contributions are welcome! Setup, scripts, and project conventions live in
CONTRIBUTING.md.
License
Licensed under GPL-3.0.