# UpdateAvailabilityZoneChangeProtection Modifies the `AvailabilityZoneChangeProtection` setting for a transit gateway-attached firewall. When enabled, this setting prevents accidental changes to the firewall's Availability Zone configuration. This helps protect against disrupting traffic flow in production environments. When enabled, you must disable this protection before using [AssociateAvailabilityZones](API_AssociateAvailabilityZones.md) or [DisassociateAvailabilityZones](API_DisassociateAvailabilityZones.md) to modify the firewall's Availability Zone configuration. ## Request Syntax ``` { "AvailabilityZoneChangeProtection": boolean, "FirewallArn": "string", "FirewallName": "string", "UpdateToken": "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. ** [AvailabilityZoneChangeProtection](#API_UpdateAvailabilityZoneChangeProtection_RequestSyntax) ** A setting indicating whether the firewall is protected against changes to the subnet associations. Use this setting to protect against accidentally modifying the subnet associations for a firewall that is in use. When you create a firewall, the operation initializes this setting to `TRUE`. Type: Boolean Required: Yes ** [FirewallArn](#API_UpdateAvailabilityZoneChangeProtection_RequestSyntax) ** The Amazon Resource Name (ARN) of the firewall. You must specify the ARN or the name, and you can specify both. Type: String Length Constraints: Minimum length of 1. Maximum length of 256. Pattern: `^arn:aws.*` Required: No ** [FirewallName](#API_UpdateAvailabilityZoneChangeProtection_RequestSyntax) ** The descriptive name of the firewall. You can't change the name of a firewall after you create it. You must specify the ARN or the name, and you can specify both. Type: String Length Constraints: Minimum length of 1. Maximum length of 128. Pattern: `^[a-zA-Z0-9-]+$` Required: No ** [UpdateToken](#API_UpdateAvailabilityZoneChangeProtection_RequestSyntax) ** An optional token that you can use for optimistic locking. Network Firewall returns a token to your requests that access the firewall. The token marks the state of the firewall resource at the time of the request. To make an unconditional change to the firewall, omit the token in your update request. Without the token, Network Firewall performs your updates regardless of whether the firewall has changed since you last retrieved it. To make a conditional change to the firewall, provide the token in your update request. Network Firewall uses the token to ensure that the firewall hasn't changed since you last retrieved it. If it has changed, the operation fails with an `InvalidTokenException`. If this happens, retrieve the firewall again to get a current copy of it with a new token. Reapply your changes as needed, then try the operation again using the new token. Type: String Length Constraints: Minimum length of 1. Maximum length of 1024. Pattern: `^([0-9a-f]{8})-([0-9a-f]{4}-){3}([0-9a-f]{12})$` Required: No ## Response Syntax ``` { "AvailabilityZoneChangeProtection": boolean, "FirewallArn": "string", "FirewallName": "string", "UpdateToken": "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. ** [AvailabilityZoneChangeProtection](#API_UpdateAvailabilityZoneChangeProtection_ResponseSyntax) ** A setting indicating whether the firewall is protected against changes to the subnet associations. Use this setting to protect against accidentally modifying the subnet associations for a firewall that is in use. When you create a firewall, the operation initializes this setting to `TRUE`. Type: Boolean ** [FirewallArn](#API_UpdateAvailabilityZoneChangeProtection_ResponseSyntax) ** The Amazon Resource Name (ARN) of the firewall. Type: String Length Constraints: Minimum length of 1. Maximum length of 256. Pattern: `^arn:aws.*` ** [FirewallName](#API_UpdateAvailabilityZoneChangeProtection_ResponseSyntax) ** The descriptive name of the firewall. You can't change the name of a firewall after you create it. Type: String Length Constraints: Minimum length of 1. Maximum length of 128. Pattern: `^[a-zA-Z0-9-]+$` ** [UpdateToken](#API_UpdateAvailabilityZoneChangeProtection_ResponseSyntax) ** An optional token that you can use for optimistic locking. Network Firewall returns a token to your requests that access the firewall. The token marks the state of the firewall resource at the time of the request. To make an unconditional change to the firewall, omit the token in your update request. Without the token, Network Firewall performs your updates regardless of whether the firewall has changed since you last retrieved it. To make a conditional change to the firewall, provide the token in your update request. Network Firewall uses the token to ensure that the firewall hasn't changed since you last retrieved it. If it has changed, the operation fails with an `InvalidTokenException`. If this happens, retrieve the firewall again to get a current copy of it with a new token. Reapply your changes as needed, then try the operation again using the new token. Type: String Length Constraints: Minimum length of 1. Maximum length of 1024. Pattern: `^([0-9a-f]{8})-([0-9a-f]{4}-){3}([0-9a-f]{12})$` ## Errors For information about the errors that are common to all actions, see [Common Error Types](CommonErrors.md). ** InternalServerError ** Your request is valid, but Network Firewall couldn't perform the operation because of a system problem. Retry your request. HTTP Status Code: 500 ** InvalidRequestException ** The operation failed because of a problem with your request. Examples include: + You specified an unsupported parameter name or value. + You tried to update a property with a value that isn't among the available types. + Your request references an ARN that is malformed, or corresponds to a resource that isn't valid in the context of the request. HTTP Status Code: 400 ** InvalidTokenException ** The token you provided is stale or isn't valid for the operation. HTTP Status Code: 400 ** ResourceNotFoundException ** Unable to locate a resource using the parameters that you provided. HTTP Status Code: 400 ** ResourceOwnerCheckException ** Unable to change the resource because your account doesn't own it. HTTP Status Code: 400 ** ThrottlingException ** Unable to process the request due to throttling limitations. 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/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection) + [AWS SDK for .NET V4](https://docs.aws.amazon.com/goto/DotNetSDKV4/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection) + [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection) + [AWS SDK for Go v2](https://docs.aws.amazon.com/goto/SdkForGoV2/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection) + [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection) + [AWS SDK for JavaScript V3](https://docs.aws.amazon.com/goto/SdkForJavaScriptV3/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection) + [AWS SDK for Kotlin](https://docs.aws.amazon.com/goto/SdkForKotlin/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection) + [AWS SDK for PHP V3](https://docs.aws.amazon.com/goto/SdkForPHPV3/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection) + [AWS SDK for Python](https://docs.aws.amazon.com/goto/boto3/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection) + [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/network-firewall-2020-11-12/UpdateAvailabilityZoneChangeProtection)