> 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/api-how-tos/get-rules.md).

# Retrieve Firewall rules by Network Security Group ID

{% hint style="info" %}
**Note:** Only contract administrators, owners, and users with permissions to the VDC concerned can create and manage NSGs via API.
{% endhint %}

{% hint style="info" %}
**Prerequisite:** You need an <code class="expression">space.vars.ionos\_cloud</code> account with API credentials configured with the appropriate permissions.
{% endhint %}

To retrieve the firewall rules by Network Security Group ID, you must use one of the following [<mark style="color:blue;">Cloud API</mark>](https://api.ionos.com/docs/cloud/v6/#tag/Data-centers) `GET` request using the `datacenterId` and `securityGroupId`:

`GET /datacenters/{datacenterId}/securitygroups/{securityGroupId}/rules`

`GET /datacenters/{datacenterId}/securitygroups/{securityGroupId}/rules/{ruleId}`

## Request

```bash
curl --location 'https://api.ionos.com/cloudapi/v6/datacenters/5a88aa8b-8aa1-51f6-XXd1-XXXXXe9f31/securitygroups/b0a54xyz-abcd-8008-8883-XX0e0428e888/rules' \
--header 'Authorization: Basic YYXabCDeFmLMO0c2hyYUBpb25vcy5jb206I1Bha2lzdGFuXzE='
```

## Response

**200 OK**

```json
{
    "id": "b0a54xyz-abcd-8008-8883-XX0e0428e888/rules",
    "type": "collection",
    "href": "https://api.ionos.com/cloudapi/v6/datacenters/5a88aa8b-8aa1-51f6-XXd1-XXXXXe9f31/securitygroups/b0a54xyz-abcd-8008-8883-XX0e0428e888/rules",
    "items": [
        {
            "id": "0A0X0885-88ix-8xxX-1020-888a4f0f8137",
            "type": "firewall-rule",
            "href": "https://api.ionos.com/cloudapi/v6/datacenters/5a88aa8b-8aa1-51f6-XXd1-XXXXXe9f31/securitygroups/b0a54xyz-abcd-8008-8883-XX0e0428e888/rules/0A0X0885-88ix-8xxX-1020-888a4f0f8137"
        }
    ]
}
```


---

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