**3X-UI** — advanced, open-source web-based control panel designed for managing Xray-core server. It offers a user-friendly interface for configuring and monitoring various VPN and proxy protocols.
Administrators can add custom GeoSite and GeoIP `.dat` files from URLs in the panel (same workflow as updating built-in geofiles). Files are stored under the same directory as the Xray binary (`XUI_BIN_FOLDER`, default `bin/`) with deterministic names: `geosite_<alias>.dat` and `geoip_<alias>.dat`.
**Routing:** Xray resolves extra lists using the `ext:` form, for example `ext:geosite_myalias.dat:tag` or `ext:geoip_myalias.dat:tag`, where `tag` is a list name inside that DAT file (same pattern as built-in regional files such as `ext:geoip_IR.dat:ir`).
**Reserved aliases:** Only for deciding whether a name is reserved, the panel compares a normalized form of the alias (`strings.ToLower`, `-` → `_`). User-entered aliases and generated file names are not rewritten in the database; they must still match `^[a-z0-9_-]+$`. For example, `geoip-ir` and `geoip_ir` collide with the same reserved entry.
- [Iran v2ray rules](https://github.com/chocolate4u/Iran-v2ray-rules) (License: **GPL-3.0**): _Enhanced v2ray/xray and v2ray/xray-clients routing rules with built-in Iranian domains and a focus on security and adblocking._
- [Russia v2ray rules](https://github.com/runetfreedom/russia-v2ray-rules-dat) (License: **GPL-3.0**): _This repository contains automatically updated V2Ray routing rules based on data on blocked domains and addresses in Russia._
