# DescribeTunnel


Gets information about a tunnel identified by the unique tunnel id.

Requires permission to access the [DescribeTunnel](https://docs.aws.amazon.com/service-authorization/latest/reference/list_awsiot.html#awsiot-actions-as-permissions) action.

## Request Syntax


```
{
   "tunnelId": "string"
}
```

## Request Parameters


For information about the parameters that are common to all actions, see [Common Parameters](CommonParameters.md).

The request accepts the following data in JSON format.

 ** [tunnelId](#API_iot-secure-tunneling_DescribeTunnel_RequestSyntax) **   <a name="iot-iot-secure-tunneling_DescribeTunnel-request-tunnelId"></a>
The tunnel to describe.  
Type: String  
Pattern: `[a-zA-Z0-9_\-+=:]{1,128}`   
Required: Yes

## Response Syntax


```
{
   "tunnel": { 
      "createdAt": number,
      "description": "string",
      "destinationConfig": { 
         "services": [ "string" ],
         "thingName": "string"
      },
      "destinationConnectionState": { 
         "lastUpdatedAt": number,
         "status": "string"
      },
      "lastUpdatedAt": number,
      "sourceConnectionState": { 
         "lastUpdatedAt": number,
         "status": "string"
      },
      "status": "string",
      "tags": [ 
         { 
            "key": "string",
            "value": "string"
         }
      ],
      "timeoutConfig": { 
         "maxLifetimeTimeoutMinutes": number
      },
      "tunnelArn": "string",
      "tunnelId": "string"
   }
}
```

## Response Elements


If the action is successful, the service sends back an HTTP 200 response.

The following data is returned in JSON format by the service.

 ** [tunnel](#API_iot-secure-tunneling_DescribeTunnel_ResponseSyntax) **   <a name="iot-iot-secure-tunneling_DescribeTunnel-response-tunnel"></a>
The tunnel being described.  
Type: [Tunnel](API_iot-secure-tunneling_Tunnel.md) object

## Errors


 ** ResourceNotFoundException **   
Thrown when an operation is attempted on a resource that does not exist.  
HTTP Status Code: 400

## See Also


For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS Command Line Interface V2](https://docs.aws.amazon.com/goto/cli2/iotsecuretunneling-2018-10-05/DescribeTunnel) 
+  [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/iotsecuretunneling-2018-10-05/DescribeTunnel) 
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/iotsecuretunneling-2018-10-05/DescribeTunnel) 
+  [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/iotsecuretunneling-2018-10-05/DescribeTunnel) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/iotsecuretunneling-2018-10-05/DescribeTunnel) 
+  [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/iotsecuretunneling-2018-10-05/DescribeTunnel) 
+  [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/iotsecuretunneling-2018-10-05/DescribeTunnel) 
+  [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/iotsecuretunneling-2018-10-05/DescribeTunnel) 
+  [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/iotsecuretunneling-2018-10-05/DescribeTunnel) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/iotsecuretunneling-2018-10-05/DescribeTunnel)