Creating a Public NAT Gateway

Function

This API is used to create a public NAT gateway.

Calling Method

For details, see Calling APIs.

URI

POST /v2/{project_id}/nat_gateways

**Table 1** Path Parameters
Parameter	Mandatory	Type	Description
project_id	Yes	String	Specifies the project ID. Minimum: 1 Maximum: 36

Request Parameters

**Table 2** Request header parameters
Parameter	Mandatory	Type	Description
X-Auth-Token	Yes	String	Specifies the user token. It is a response to the API for obtaining a user token. This API is the only one that does not require authentication. The value of X-Subject-Token in the response header is the token. Minimum: 1 Maximum: 10240

**Table 3** Request body parameters
Parameter	Mandatory	Type	Description
nat_gateway	Yes	CreateNatGatewayOption object	Specifies the request body for creating the public NAT gateway.

**Table 4** CreateNatGatewayOption
Parameter	Mandatory	Type	Description
name	Yes	String	Specifies the public NAT gateway name. You can enter up to 64 characters. Only digits, letters, underscores (_), and hyphens (-) are allowed. Minimum: 1 Maximum: 64
router_id	Yes	String	Specifies the VPC ID. Minimum: 36 Maximum: 36
internal_network_id	Yes	String	Specifies the network ID of the downstream interface (the next hop of DVR) of the public NAT gateway. DVR is Distributed Virtual Routing. Minimum: 36 Maximum: 36
description	No	String	Provides supplementary information about the public NAT gateway. The description can contain up to 255 characters and cannot contain angle brackets (<>). Minimum: 0 Maximum: 255
spec	Yes	String	Specifies the public NAT gateway specifications. The value can be: 1: small, which supports a maximum of 10,000 SNAT connections 2: medium, which supports up to 50,000 SNAT connections. 3: large, which supports up to 200,000 SNAT connections. 4: extra-large, which supports up to 1,000,000 SNAT connections. Enumeration values: 1 2 3 4
enterprise_project_id	No	String	Specifies the ID of the enterprise project associated with the public NAT gateway when the gateway is created. For more information about enterprise projects and how to obtain enterprise project IDs, see Enterprise Management User Guide. Default: 0 Minimum: 1 Maximum: 36
session_conf	No	SessionConfiguration object	Specifies the session parameters for the public NAT gateway.
ngport_ip_address	No	String	Specifies the private IP address of the public NAT gateway, which is assigned by the VPC subnet. Minimum: 7 Maximum: 15

**Table 5** SessionConfiguration
Parameter	Mandatory	Type	Description
tcp_session_expire_time	No	Integer	Specifies the TCP session duration. Minimum: 40 Maximum: 7200
udp_session_expire_time	No	Integer	Specifies the UDP session duration. Minimum: 40 Maximum: 7200
icmp_session_expire_time	No	Integer	Specifies the ICMP session duration. Minimum: 10 Maximum: 7200
tcp_time_wait_time	No	Integer	Specifies how long the side that actively closed the TCP connection is in the TIME_WAIT state. Minimum: 0 Maximum: 1800

Response Parameters

Status code: 201

**Table 6** Response body parameters
Parameter	Type	Description
nat_gateway	NatGatewayResponseBody object	Specifies the response body for a public NAT gateway.

**Table 7** NatGatewayResponseBody
Parameter	Type	Description
id	String	Specifies the public NAT gateway ID. Minimum: 36 Maximum: 36
tenant_id	String	Specifies the project ID. Minimum: 1 Maximum: 36
name	String	Specifies the public NAT gateway name. You can enter up to 64 characters. Minimum: 1 Maximum: 64
description	String	Provides supplementary information about the public NAT gateway. The description can contain up to 255 characters and cannot contain angle brackets (<>). Minimum: 0 Maximum: 255
spec	String	Specifies the public NAT gateway specifications. The value can be: 1: small, which supports a maximum of 10,000 SNAT connections 2: medium, which supports up to 50,000 SNAT connections. 3: large, which supports up to 200,000 SNAT connections. 4: extra-large, which supports up to 1,000,000 SNAT connections. Enumeration values: 1 2 3 4
status	String	Specifies the public NAT gateway status. The value can be: ACTIVE: The public NAT gateway is available. PENDING_CREATE: The public NAT gateway is being created. PENDING_UPDATE: The public NAT gateway is being updated. PENDING_DELETE: The public NAT gateway is being deleted. INACTIVE: The public NAT gateway is unavailable. Enumeration values: ACTIVE PENDING_CREATE PENDING_UPDATE PENDING_DELETE INACTIVE
admin_state_up	Boolean	Specifies whether the public NAT gateway is frozen. The value can be: true: The public NAT gateway is unfrozen. false: The public NAT gateway is frozen.
created_at	String	Specifies when the public NAT gateway was created. The time is in yyyy-mm-dd hh:mm:ss.SSSSSS format. Minimum: 1 Maximum: 36
router_id	String	Specifies the VPC ID. Minimum: 36 Maximum: 36
internal_network_id	String	Specifies the network ID of the downstream interface (the next hop of DVR) of the public NAT gateway. DVR is Distributed Virtual Routing. Minimum: 36 Maximum: 36
enterprise_project_id	String	Specifies the ID of the enterprise project associated with the public NAT gateway when the gateway is created. Minimum: 1 Maximum: 36
session_conf	SessionConfiguration object	Specifies the session parameters for the public NAT gateway.
ngport_ip_address	String	Specifies the private IP address of the public NAT gateway, which is assigned by the VPC subnet. Minimum: 7 Maximum: 15
billing_info	String	Specifies the order information. This parameter is available only when you buy yearly/monthly resources. This parameter is left blank when your buy pay-per-use resources.
dnat_rules_limit	Long	Specifies the maximum number of DNAT rules on a public NAT gateway. The default value is 200. Minimum: 1 Maximum: 100000
snat_rule_public_ip_limit	Integer	Specifies the maximum number of SNAT rules on a public NAT gateway. The default value is 20. Minimum: 1 Maximum: 100

**Table 8** SessionConfiguration
Parameter	Type	Description
tcp_session_expire_time	Integer	Specifies the TCP session duration. Minimum: 40 Maximum: 7200
udp_session_expire_time	Integer	Specifies the UDP session duration. Minimum: 40 Maximum: 7200
icmp_session_expire_time	Integer	Specifies the ICMP session duration. Minimum: 10 Maximum: 7200
tcp_time_wait_time	Integer	Specifies how long the side that actively closed the TCP connection is in the TIME_WAIT state. Minimum: 0 Maximum: 1800

Example Requests

Creating a public NAT gateway

POST https://{Endpoint}/v2/70505c941b9b4dfd82fd351932328a2f/nat_gateways 

{
  "nat_gateway" : {
    "name" : "nat_001",
    "description" : "my nat gateway 01",
    "router_id" : "d84f345c-80a1-4fa2-a39c-d0d397c3f09a",
    "internal_network_id" : "89d66639-aacb-4929-969d-07080b0f9fd9",
    "spec" : "1",
    "enterprise_project_id" : "0aad99bc-f5f6-4f78-8404-c598d76b0ed2"
  }
}

Example Responses

Status code: 201

Public NAT gateway created.

{
  "nat_gateway" : {
    "id" : "14338426-6afe-4019-996b-3a9525296e11",
    "name" : "nat_001",
    "description" : "my nat gateway 01",
    "router_id" : "d84f345c-80a1-4fa2-a39c-d0d397c3f09a",
    "spec" : "1",
    "admin_state_up" : true,
    "tenant_id" : "70505c941b9b4dfd82fd351932328a2f",
    "internal_network_id" : "89d66639-aacb-4929-969d-07080b0f9fd9",
    "enterprise_project_id" : "0aad99bc-f5f6-4f78-8404-c598d76b0ed2",
    "status" : "PENDING_CREATE",
    "billing_info" : "",
    "dnat_rules_limit" : 200,
    "snat_rule_public_ip_limit" : 20,
    "ngport_ip_address" : "192.168.0.138",
    "created_at" : "2019-04-22 08:47:13.234512"
  }
}