> 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/network-services/nat-gateway/api-howtos/create-nat-gateway-rule.md). # Create a NAT Gateway Rule Create a NAT gateway rule to configure Source NAT (SNAT) behavior for your private network traffic using the `POST` request. The rules determine which private IP addresses can access the Internet through the NAT gateway. {% hint style="info" %} **Rule specifications:** Define a name, protocol (`TCP`, `UDP`, `ICMP`, `ESP`, `AH`, or `GRE`), source subnet, and target subnet for each rule. You can also optionally specify a target port range. {% endhint %} ## Endpoint `https://api.ionos.com/cloudapi/v6/datacenters/{datacenterId}/natgateways/{natGatewayId}/rules` ## Request ```bash curl --location \ --request POST 'https://api.ionos.com/cloudapi/v6/datacenters/15f67991-0f51-4efc-a8ad-ef1fb31a480c/natgateways/d8fbc490-3b3e-4f7a-b6e1-2c8d5f3e7a9b/rules' \ --header 'Authorization: Bearer $IONOS_TOKEN' \ --header 'Content-Type: application/json' \ --data-raw '{ "properties": { "name": "Web Traffic Rule", "protocol": "TCP", "publicIp": "203.0.113.50", "sourceSubnet": "10.0.1.0/24", "targetSubnet": "0.0.0.0/0", "targetPortRange": { "start": 80, "end": 443 }, "type": "SNAT" } }' ``` {% tabs %} {% tab title="Request Body Parameters" %} The following table lists the request body parameters: | **Body Parameters** | **Required** | **Type** | **Description** | **Example** | | ---------------------------------- | ------------ | -------- | --------------------------------------------------------------------------------------------------------------- | ---------------------- | | `properties.name` | yes | string | The name of the NAT gateway rule. | `Web Traffic Rule` | | `properties.protocol` | no | string | The network protocol for the rule. If you do not specify a protocol, the system allows all supported protocols. | `TCP` | | `properties.publicIp` | yes | string | The public IP address that the NAT gateway uses for the specific rule. | `203.0.113.50` | | `properties.sourceSubnet` | yes | string | The source subnet in CIDR notation. | `10.0.1.0/24` | | `properties.targetSubnet` | no | string | The target or destination subnet in CIDR notation. | `0.0.0.0/0` | | `properties.targetPortRange` | no | object | The port range for the target subnet. | See nested properties. | | `properties.targetPortRange.start` | no | integer | The starting port of the range. | `80` | | `properties.targetPortRange.end` | no | integer | The ending port of the range. | `443` | | `properties.type` | no | string | The type of NAT gateway rule. | `SNAT` | | {% endtab %} | | | | | {% tab title="Request Header Parameters" %} Include the following mandatory fields in the request header to authenticate your requests: | **Header Parameters** | **Required** | **Type** | **Description** | | --------------------- | ------------ | -------- | --------------------------------------------------------------------------- | | `Authorization` | yes | string | Use a Bearer token to authenticate requests through a JSON Web Token (JWT). | | `Content-Type` | yes | string | Set it to `application/json`. | | {% endtab %} | | | | | {% endtabs %} | | | | ## Response A **202 Accepted** response indicates that the NAT Gateway rule is successfully created. The `id` and other details are provided in the response. {% hint style="info" %} **Note:** NAT Gateway rule creation is performed asynchronously. The resource maintains a `BUSY` status until provisioning completes. The response includes a `Location` header with a URL to poll the request status. {% endhint %} ```json { "id": "a7f2e4d8-9c3b-4f6a-b5e8-1d2c3f4a5b6c", "type": "nat-gateway-rule", "href": "/cloudapi/v6/datacenters/15f67991-0f51-4efc-a8ad-ef1fb31a480c/natgateways/d8fbc490-3b3e-4f7a-b6e1-2c8d5f3e7a9b/rules/a7f2e4d8-9c3b-4f6a-b5e8-1d2c3f4a5b6c", "metadata": { "etag": "45480eb3fbfc31f1d916c1eaa4abdcc3", "createdDate": "2024-01-15T13:45:30+00:00", "createdBy": "ionos:identity:::users/87f9d82e-b28d-49ed-9d04-fba2c0459cd3", "createdByUserId": "87f9d82e-b28d-49ed-9d04-fba2c0459cd3", "lastModifiedDate": "2024-01-15T13:45:30+00:00", "lastModifiedBy": "ionos:identity:::users/87f9d82e-b28d-49ed-9d04-fba2c0459cd3", "lastModifiedByUserId": "87f9d82e-b28d-49ed-9d04-fba2c0459cd3", "state": "BUSY" }, "properties": { "name": "Web Traffic Rule", "protocol": "TCP", "publicIp": "203.0.113.50", "sourceSubnet": "10.0.1.0/24", "targetSubnet": "0.0.0.0/0", "targetPortRange": { "start": 80, "end": 443 }, "type": "SNAT" } } ``` --- # Agent Instructions This documentation is published with GitBook. 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