# Commonly used ports

### Client - Server - Infrastructure Communication

The table provided below enumerates the commonly used ports for both the Helmut server and client.

<table><thead><tr><th width="214.33333333333331">Type</th><th width="143">Protocol</th><th>Port</th><th>Notes</th></tr></thead><tbody><tr><td>MoovIT's repository<br>repo.moovit24.de</td><td>TCP</td><td>443</td><td>needed to update / install new version</td></tr><tr><td>DNS</td><td>TCP</td><td>53</td><td></td></tr><tr><td>SMB</td><td>TCP</td><td>137, 138, 139, 445</td><td>may vary depending on the storage</td></tr><tr><td>LDAP</td><td>TCP &#x26; UDP</td><td>389</td><td></td></tr><tr><td>SMTP</td><td>TCP</td><td>25</td><td></td></tr><tr><td>Helmut Client</td><td>TCP</td><td>80, 443</td><td>Depending if SSL is enabled</td></tr><tr><td>Portainer</td><td>TCP</td><td>9000</td><td></td></tr></tbody></table>

### Server - WAN Communication

The host operating system should have access to its own repository for updates, upgrades, and installation of additional dependencies or packages.

This also includes common Docker repository URLs, such as docker.com and docker.io, which are essential for updating the Docker environment and pulling new images for applications like Portainer.


---

# Agent Instructions: Querying This Documentation

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

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.helmut.de/helmut4-releases/getting-started/tech-specs/commonly-used-ports.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
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.