# NatGatewayMapping
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A NAT gateway that a proxy mode firewall uses to proxy traffic. This is used in [CreateFirewall](API_CreateFirewall.md) when `NoSourcePreservation` is `TRUE`. 

## Contents
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 ** NatGatewayId **   <a name="networkfirewall-Type-NatGatewayMapping-NatGatewayId"></a>
A unique identifier for the NAT gateway to use with proxy resources.  
Type: String  
Length Constraints: Minimum length of 1.  
Required: Yes

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\+\+](https://docs.aws.amazon.com/goto/SdkForCpp/network-firewall-2020-11-12/NatGatewayMapping) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/network-firewall-2020-11-12/NatGatewayMapping) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/network-firewall-2020-11-12/NatGatewayMapping)