This is the new *Amazon CloudFormation Template Reference Guide*. Please update your bookmarks and links. For help getting started with CloudFormation, see the [Amazon CloudFormation User Guide](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/Welcome.html).

# AWS::AppMesh::Mesh EgressFilter
<a name="aws-properties-appmesh-mesh-egressfilter"></a>

An object that represents the egress filter rules for a service mesh.

## Syntax
<a name="aws-properties-appmesh-mesh-egressfilter-syntax"></a>

To declare this entity in your Amazon CloudFormation template, use the following syntax:

### JSON
<a name="aws-properties-appmesh-mesh-egressfilter-syntax.json"></a>

```
{
  "[Type](#cfn-appmesh-mesh-egressfilter-type)" : {{String}}
}
```

### YAML
<a name="aws-properties-appmesh-mesh-egressfilter-syntax.yaml"></a>

```
  [Type](#cfn-appmesh-mesh-egressfilter-type): {{String}}
```

## Properties
<a name="aws-properties-appmesh-mesh-egressfilter-properties"></a>

`Type`  <a name="cfn-appmesh-mesh-egressfilter-type"></a>
The egress filter type. By default, the type is `DROP_ALL`, which allows egress only from virtual nodes to other defined resources in the service mesh (and any traffic to `*.amazonaws.com` for Amazon API calls). You can set the egress filter type to `ALLOW_ALL` to allow egress to any endpoint inside or outside of the service mesh.  
If you specify any backends on a virtual node when using `ALLOW_ALL`, you must specifiy all egress for that virtual node as backends. Otherwise, `ALLOW_ALL` will no longer work for that virtual node.
*Required*: Yes  
*Type*: String  
*Allowed values*: `ALLOW_ALL | DROP_ALL`  
*Update requires*: [No interruption](https://docs.amazonaws.cn/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)