> For the complete documentation index, see [llms.txt](https://docs.linuxgsm.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.linuxgsm.com/steamcmd/steam-master-server.md).

# Steam Master Server

Some game servers are listed on the steam master server list

For a game server to be seen online it normally has to register itself on a master server list. Valve maintains a master server for many different games. The master server is used to populate the server browser.

![](https://1934041264-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LJf1_IiU2L1vVxT7iNe%2F-LgyPR7R9m16G24BRw7n%2F-LgyQYZzEmW_2eMdNV-t%2FScreenshot%20from%202019-06-09%2023-48-11.png?alt=media\&token=f86b183e-791b-4c15-a8cb-844cb905a846)

## Master Server Check

LinuxGSM can check that supported game servers are listed on the steam master server. This is useful for confirming that the server is actually registering and to help diagnose issues.

You can check that your server is listed on the master server by using `./gameserver details`

```
Master server:    listed
```

{% hint style="info" %}
Not all game servers support this option but if it does the setting is set to true by default.
{% endhint %}

```
steammaster="true"
```

## Troubleshooting: Server Missing from Master Server List

There are instances when a game server might not appear in the server list due to several common reasons:

* Server Loading Time: Please be patient while the server loads, as it may take some time before it becomes visible. Depending on the game server type, certain servers require additional time for tasks like map seeding or loading mods.
* Blocked or Misconfigured [Ports](/networking/ports.md): Ensure that the ports are correctly set up and not blocked. To verify the connection, try connecting directly to the server.
* Filtering in Server List: Check that you have not applied any filters in the server browser. Filters like specific maps, "Empty Server," or "Password Protected" should be unchecked to display all available servers.
* Server Browser Limitations: It's possible that the server browser functionality of the game might not list all available game servers. In such cases, not all servers may be visible in the server list.


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## Querying This Documentation
If you need additional information that is not directly available in this page, you can query the documentation by asking a question.

Perform an HTTP GET request on the following URL with the `ask` and `goal` query parameters:

```
GET https://docs.linuxgsm.com/steamcmd/steam-master-server.md?ask=<question>&goal=<user_goal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is what the user is ultimately trying to achieve, the reason they need the answer. Sharing it helps GitBook give you a better, more relevant answer. A goal is most helpful when it describes the outcome the user wants rather than restating the question. For example, with `ask=how do I create an API token`, a goal like `automate deployments from our CI pipeline` lets GitBook tailor the answer to that use case.

The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.