# ConnectionTrackingSpecificationRequest
A security group connection tracking specification request that enables you to set the idle timeout for connection tracking on an Elastic network interface. For more information, see [Connection tracking timeouts](https://docs.aws.amazon.com/AWSEC2/latest/UserGuide/security-group-connection-tracking.html#connection-tracking-timeouts) in the *Amazon EC2 User Guide*.
## Contents
** TcpEstablishedTimeout ** (request), ** TcpEstablishedTimeout ** (response)
Timeout (in seconds) for idle TCP connections in an established state. Min: 60 seconds. Max: 432000 seconds (5 days). Default: 432000 seconds. Recommended: Less than 432000 seconds.
Type: Integer
Required: No
** UdpStreamTimeout ** (request), ** UdpStreamTimeout ** (response)
Timeout (in seconds) for idle UDP flows classified as streams which have seen more than one request-response transaction. Min: 60 seconds. Max: 180 seconds (3 minutes). Default: 180 seconds.
Type: Integer
Required: No
** UdpTimeout ** (request), ** UdpTimeout ** (response)
Timeout (in seconds) for idle UDP flows that have seen traffic only in a single direction or a single request-response transaction. Min: 30 seconds. Max: 60 seconds. Default: 30 seconds.
Type: Integer
Required: No
## See Also
For more information about using this API in one of the language-specific AWS SDKs, see the following:
+ [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/ec2-2016-11-15/ConnectionTrackingSpecificationRequest)
+ [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/ec2-2016-11-15/ConnectionTrackingSpecificationRequest)
+ [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/ec2-2016-11-15/ConnectionTrackingSpecificationRequest)