# Update a Distribution
{% hint style="info" %}
**Prerequisite:** Only contract administrators, owners, and users with `accessAndManageCdn` privilege can create and manage CDN distributions via the API. You can also set user privileges in the DCD. For more information, see [Set User Privileges](/cloud/network-services/cdn/dcd-how-tos/set-user-privileges-cdn-dcd.md).
{% endhint %}
To update an existing CDN distribution, perform a `PUT` request with the `distributionID` of the CDN. The CDN distribution for a given `distributionID` is updated with the provided distribution details.
{% hint style="info" %}
**Note:** If a CDN distribution for a given `distributionID` does not exist, a distribution is created instead.
{% endhint %}
## Endpoint
Use the following endpoint to create or update a CDN distribution: `https://cdn.de-fra.ionos.com/distributions/{distributionId}`.
## Request
{% hint style="info" %}
**Note:** The following request contains a sample `distributionId`. Replace them with the `distributionId` value whose information you want to update.
{% endhint %}
```bash
curl --location \
--request PUT 'https://cdn.de-fra.ionos.com/distributions/9ba15778-16c4-543c-8775-e52acf4853f5' \
--header 'Authorization: Bearer eyJ0eXAiOiJKV1QiLCJraWQiO' \
--header 'Content-Type: application/json' \
--data '{
"id": "9ba15778-16c4-543c-8775-e52acf4853f5",
"metadata": {},
"properties": {
"domain": "example.com",
"certificateId": "5a029f4a-72e5-11ec-90d6-0242ac120003",
"routingRules": [
{
"scheme": "http/https",
"prefix": "/api",
"upstream": {
"host": "server.example.com",
"caching": true,
"waf": true,
"geoRestrictions": {
"blockList": [
"CN",
"RU"
]
},
"rateLimitClass": "R100",
"sniMode": "distribution"
}
}
]
}
}'
```
{% tabs %}
{% tab title="Path Parameters" %}
Below is the list of mandatory path parameter:
| **Path Parameter** | **Type** | **Description** | **Example** |
| ------------------ | -------- | -------------------------------------- | -------------------------------------- |
| `distributionId` | string | The ID (UUID) of the CDN distribution. | `9ba15778-16c4-543c-8775-e52acf4853f5` |
| {% endtab %} | | | |
{% tab title="Request Body Parameters" %}
Below is the list of mandatory body parameters:
| **Body Parameters** | **Type** | **Description** | **Example** |
| ------------------- | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | -------------------------------------- |
| `id` | string | The ID (UUID) of the CDN distribution. | `9ba15778-16c4-543c-8775-e52acf4853f5` |
| `domain` | string | The domain name for the CDN distribution. | `example.com` |
| `scheme` | string | Choose whether to allow `http`, `https`, or `http/https` protocol. | `http/https` |
| `prefix` | string | A prefix to match the beginning segment of the URL path and apply routing rule. | `/api` |
| `host` | string | An upstream host name that handles requests if data not cached in the CDN edge server. | `server.example.com` |
| `caching` | boolean | If enabled, CDN caches the data from the upstream host. | `true` |
| `waf` | boolean | If enabled, protects the upstream host. | `true` |
| `rateLimitClass` | string | Limits the number of incoming requests per IP. | `R10` |
| `sniMode` | string | This field sets the SNI mode for the outgoing connection to the upstream host. Use `distribution` if the certificate must match the CDN distribution domain. Alternatively, use `origin` to ensure the certificate matches the upstream hostname. | `distribution` |
| {% endtab %} | | | |
{% tab title="Request Header Parameters" %}
To make authenticated requests to the API, the following fields are mandatory in the request header:
| **Header Parameters** | **Required** | **Type** | **Description** |
| --------------------- | ------------ | -------- | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `Authorization` | yes | string | The Bearer token enables requests to authenticate using a JSON Web Token (JWT). From the DCD, [Generate authentication token](/cloud/set-up-ionos-cloud/management/identity-access-management/token-manager.md#generate-authentication-token). |
| `Content-Type` | yes | string | Set this to `application/json`. |
| {% endtab %} | | | |
| {% endtabs %} | | | |
## Response
`PUT` returns **200 Successful operation** when it updates an existing distribution. If the `distributionId` does not exist, the API creates a new distribution and returns **201** instead.
Following is an example of a successfully updated CDN distribution.
```bash
{
"id": "9ba15778-16c4-543c-8775-e52acf4853f5",
"type": "distribution",
"href": "/distributions/9ba15778-16c4-543c-8775-e52acf4853f5",
"metadata": {
"createdDate": "2020-12-10T13:37:50+01:00",
"createdBy": "ionos:identity:::users/87f9a82e-b28d-49ed-9d04-fba2c0459cd3",
"createdByUserId": "87f9a82e-b28d-49ed-9d04-fba2c0459cd3",
"lastModifiedDate": "2020-12-11T13:37:50+01:00",
"lastModifiedBy": "ionos:identity:::users/87f9a82e-b28d-49ed-9d04-fba2c0459cd3",
"lastModifiedByUserId": "87f9a82e-b28d-49ed-9d04-fba2c0459cd3",
"resourceURN": "ionos::::",
"publicEndpointIpv4": "1.2.3.4",
"publicEndpointIpv6": "2001:db8::ff00:42:8329",
"state": "AVAILABLE",
"message": "In progress."
},
"properties": {
"domain": "example.com",
"certificateId": "5a029f4a-72e5-11ec-90d6-0242ac120003",
"routingRules": [
{
"scheme": "http/https",
"prefix": "/api",
"upstream": {
"host": "server.example.com",
"caching": true,
"waf": true,
"geoRestrictions": {
"blockList": [
"CN",
"RU"
]
},
"rateLimitClass": "R100",
"sniMode": "origin"
}
}
]
}
}
```
{% hint style="success" %}
**Result:** A CDN distribution is successfully updated or created.
{% endhint %}
---
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```
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```
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