> For the complete documentation index, see [llms.txt](https://hayston.gitbook.io/flp-wiki/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://hayston.gitbook.io/flp-wiki/configuration-reference/fabric.md).

# Fabric configuration

File: `config/fastloginplus-fabric.yml` on the Fabric backend. Stop the server to edit it, then restart. This file controls local settings only; configure Java and Bedrock login policies in [Velocity configuration](/flp-wiki/configuration-reference/velocity.md).

| Option                  | Default | Purpose                                                                                                         |
| ----------------------- | ------- | --------------------------------------------------------------------------------------------------------------- |
| `language`              | `en`    | Backend message language: `en` or `zh`; other nonempty values warn and use English                              |
| `debug`                 | `false` | Enable diagnostic logs                                                                                          |
| `check-update`          | `true`  | Check for new releases in the background; does not download or install them                                     |
| `update-check-interval` | `24`    | Update check interval in hours; values below 1 use 24                                                           |
| `allowed-proxy-ids`     | Empty   | Trusted Velocity proxy UUIDs, comma-separated; obtain them from the proxy's `plugins/fastloginplus/proxyId.txt` |

`allowed-proxy-ids` is not the forwarding secret. Leaving it empty affects Bedrock login and premium binding that require a trusted proxy identity. The proxy's `forwarding.secret` belongs in FabricProxy-Lite's configuration. See the [Fabric installation guide](/flp-wiki/install-and-deploy/fabric.md) for setup and EasyAuth settings.


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