# TransitGatewayRequestPolicyRule
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The matching criteria for a transit gateway policy table entry.

## Contents
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 ** DestinationCidrBlock **   
The destination CIDR block for the policy rule.  
Type: String  
Required: No

 ** DestinationPortRange **   
The destination port or port range for the policy rule. You can specify a port range only when `Protocol` is `6` (TCP) or `17` (UDP); for all other protocols, this value must be `*`.  
Type: String  
Required: No

 ** MetaData **   
The metadata key-value pair for the policy rule.  
Type: [TransitGatewayRequestPolicyRuleMetaData](API_TransitGatewayRequestPolicyRuleMetaData.md) object  
Required: No

 ** Protocol **   
The protocol for the policy rule. Valid values are `1` (ICMP), `6` (TCP), `17` (UDP), `47` (GRE), or `*` for all protocols.  
Type: String  
Required: No

 ** SourceCidrBlock **   
The source CIDR block for the policy rule.  
Type: String  
Required: No

 ** SourcePortRange **   
The source port or port range for the policy rule. You can specify a port range only when `Protocol` is `6` (TCP) or `17` (UDP); for all other protocols, this value must be `*`.  
Type: String  
Required: No

## See Also
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For more information about using this API in one of the language-specific Amazon SDKs, see the following:
+  [Amazon SDK for C\+\+](https://docs.amazonaws.cn/goto/SdkForCpp/ec2-2016-11-15/TransitGatewayRequestPolicyRule) 
+  [Amazon SDK for Java V2](https://docs.amazonaws.cn/goto/SdkForJavaV2/ec2-2016-11-15/TransitGatewayRequestPolicyRule) 
+  [Amazon SDK for Ruby V3](https://docs.amazonaws.cn/goto/SdkForRubyV3/ec2-2016-11-15/TransitGatewayRequestPolicyRule)