# Obtain the information of the internal and external IP mapping rules created based on NAT - DescribeSnatDnatRule

## Overview

Obtain the information of the internal and external IP mapping rules created based on NAT

 > 💡 Only one parameter is allowed to have a value at the same time for PrivateIp and NATGW.




## Definition

### Public Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Action**     | string  | Corresponding API command name, the current API is `DescribeSnatDnatRule`.                      | **Yes** |
| **PublicKey**  | string  | The user's public key can be obtained from [Console](https://console.genesissai.com/uaccount/api_manage)                                             | **Yes** |
| **Signature**  | string  | User signature generated based on public key and API command, see [Signature Algorithm](/docs/api/summary/signature.md)  | **Yes** |

### Request Parameters

| Parameter Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **Region** | string | Region. See [List of Regions and Availability Zones](/docs/api/summary/regionlist) |**Yes**|
| **ProjectId** | string | Project ID. If not filled in, the default project is used, sub-accounts must be filled in. Please refer to the [GetProjectList interface](/docs/api/summary/get_project_list). |No|
| **NATGWId.N** | string | Retrieve all SnatDnatRule information added on NAT |No|
| **EIP.N** | string | Get the SnatDnatRule information corresponding to EIP |No|

### Response Field

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **RetCode** | int | Return status code. If it is 0, it means successful return. If it is not 0, it means failure. |**Yes**|
| **Action** | string | Operation command name. |**Yes**|
| **Message** | string | Returns an error message, providing detailed description when `RetCode` is non-zero. |No|
| **DataSet** | array[[*SnatDnatRuleInfo*](#snatdnatruleinfo)] | Rule Information |No|

#### Data Model


#### SnatDnatRuleInfo

| Field Name | Type | Description Information | Required |
|:---|:---|:---|:---|
| **PrivateIp** | string | Private IP Address |No|
| **NATGWId** | string | The NAT Gateway resource ID used for mapping |No|
| **EIP** | string | EIP's IP address |No|

## Example

### Request Example
    
```
https://api.genesissai.com/?Action=DescribeSnatDnatRule
&Region=cn-zj
&ProjectId=QRbWkHUb
&NATGWId=cDLnarQV
&Offset=kbFtTKlH
&Limit=GMKqQMhV
&PrivateIp.n=NbnLFMsf
&EIPAddr.n=eWlihxoN
&RuleId.n=kHylfauB
&PrivateIp.n=hpZCJtGP
&EIPAddr.n=zQgqwHES
&RuleId.n=mXPVWbPY
```

### Response Example
    
```json
{
  "Action": "DescribeSnatDnatRuleResponse",
  "NATGWMapInfos": "qIQkNLMg",
  "RetCode": 0
}
```