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

# AWS::ElastiCache::SecurityGroupIngress
<a name="aws-resource-elasticache-securitygroupingress"></a>

The AWS::ElastiCache::SecurityGroupIngress type authorizes ingress to a cache security group from hosts in specified Amazon EC2 security groups. For more information about ElastiCache security group ingress, go to [AuthorizeCacheSecurityGroupIngress](https://docs.aws.amazon.com/AmazonElastiCache/latest/APIReference/API_AuthorizeCacheSecurityGroupIngress.html) in the *Amazon ElastiCache API Reference Guide*. 

**Note**  
Updates are not supported.

## Syntax
<a name="aws-resource-elasticache-securitygroupingress-syntax"></a>

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

### JSON
<a name="aws-resource-elasticache-securitygroupingress-syntax.json"></a>

```
{
  "Type" : "AWS::ElastiCache::SecurityGroupIngress",
  "Properties" : {
      "[CacheSecurityGroupName](#cfn-elasticache-securitygroupingress-cachesecuritygroupname)" : String,
      "[EC2SecurityGroupName](#cfn-elasticache-securitygroupingress-ec2securitygroupname)" : String,
      "[EC2SecurityGroupOwnerId](#cfn-elasticache-securitygroupingress-ec2securitygroupownerid)" : String
    }
}
```

### YAML
<a name="aws-resource-elasticache-securitygroupingress-syntax.yaml"></a>

```
Type: AWS::ElastiCache::SecurityGroupIngress
Properties:
  [CacheSecurityGroupName](#cfn-elasticache-securitygroupingress-cachesecuritygroupname): String
  [EC2SecurityGroupName](#cfn-elasticache-securitygroupingress-ec2securitygroupname): String
  [EC2SecurityGroupOwnerId](#cfn-elasticache-securitygroupingress-ec2securitygroupownerid): String
```

## Properties
<a name="aws-resource-elasticache-securitygroupingress-properties"></a>

`CacheSecurityGroupName`  <a name="cfn-elasticache-securitygroupingress-cachesecuritygroupname"></a>
The name of the Cache Security Group to authorize.  
*Required*: Yes  
*Type*: String  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`EC2SecurityGroupName`  <a name="cfn-elasticache-securitygroupingress-ec2securitygroupname"></a>
Name of the EC2 Security Group to include in the authorization.  
*Required*: Yes  
*Type*: String  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

`EC2SecurityGroupOwnerId`  <a name="cfn-elasticache-securitygroupingress-ec2securitygroupownerid"></a>
Specifies the Amazon Account ID of the owner of the EC2 security group specified in the EC2SecurityGroupName property. The Amazon access key ID is not an acceptable value.   
*Required*: No  
*Type*: String  
*Update requires*: [No interruption](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/using-cfn-updating-stacks-update-behaviors.html#update-no-interrupt)

## Return values
<a name="aws-resource-elasticache-securitygroupingress-return-values"></a>

### Ref
<a name="aws-resource-elasticache-securitygroupingress-return-values-ref"></a>

When the logical ID of this resource is provided to the `Ref` intrinsic function, `Ref` returns the resource name. 

For more information about using the `Ref` function, see [Ref](https://docs.aws.amazon.com/AWSCloudFormation/latest/UserGuide/intrinsic-function-reference-ref.html).

### Fn::GetAtt
<a name="aws-resource-elasticache-securitygroupingress-return-values-fn--getatt"></a>