> For the complete documentation index, see [llms.txt](https://docs.ionos.com/cloud/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ionos.com/cloud/security/network-security-groups/how-tos/modify-rules.md).

# Modify Rules

It's a good practice to regularly review your NSG rules and modify the existing rules to reflect changes in security protocols or policies or define new rules to address emerging security threats or changing business requirements.

To define rules, follow these steps:

1\. In the **DCD**, go to **Menu** > **Security** > **Network Security Groups**.

2\. Select a data center from the drop-down list.

3\. Select an NSG in one of the following ways to modify it:

* select the **NAME** of the respective NSG.
* select **View & Edit**.

![Select NSG to update rules associated with it](https://1737632334-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MifAzdGvKLDTtvJP8sm%2Fuploads%2Fgit-blob-dfcc5eae5bab0643e87dc6883dbd521b1749c83c%2Fcreate-rule-select-nsg.png?alt=media)

4\. In the **View & Edit Group** window, select the rule in one of the following ways to modify it:

* select the **NAME** of the respective rule.
* select **View & Edit**.

![Select a rule](https://1737632334-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MifAzdGvKLDTtvJP8sm%2Fuploads%2Fgit-blob-5f86052d3d491fa018cfae21e0eb5c41a64309a2%2Fmodify-rules.png?alt=media)

5\. Update the necessary details. You can only edit those values that are enabled for modification.

6\. Select **Edit**.

![Modify the rule](https://1737632334-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2F-MifAzdGvKLDTtvJP8sm%2Fuploads%2Fgit-blob-d3f05f3e435a01fd3d6ed4e046649b3ed3c5955e%2Fmodify-rules1.png?alt=media)

{% hint style="success" %}
**Result:** The selected rule is updated.
{% endhint %}


---

# 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.ionos.com/cloud/security/network-security-groups/how-tos/modify-rules.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.