Update the TCP idle timeout for your Network Load Balancer listener - Elastic Load Balancing
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Update the TCP idle timeout for your Network Load Balancer listener

For each TCP request made through a Network Load Balancer, the state of that connection is tracked. If no data is sent through the connection by either the client or target for longer than the idle timeout, the connection is closed.

Considerations

  • The default idle timeout value for TCP flows is 350 seconds.

  • The connection idle timeout for TLS listeners is 350 seconds and can't be modified.

Console
To update the TCP idle timeout

  1. Open the Amazon EC2 console at https://console.amazonaws.cn/ec2/.

  2. In the navigation pane, under Load Balancing, choose Load Balancers.

  3. Select the check box for the Network Load Balancer.

  4. On the listeners tab, select the check box for the TCP listener and then choose Actions, View listener details.

  5. On the listener details page, in the Attributes tab, select Edit. If the listener uses a protocol other than TCP, this tab is not present.

  6. Enter a value for TCP idle timeout from 60-6000 seconds.

  7. Choose Save changes.

Amazon CLI
To update the TCP idle timeout

Use the modify-listener-attributes command with the tcp.idle_timeout.seconds attribute.

aws elbv2 modify-listener-attributes \
    --listener-arn arn:aws-cn:elasticloadbalancing:us-west-2:123456789012:listener/net/my-load-balancer/1234567890123456/1234567890123456 \
    --attributes Key=tcp.idle_timeout.seconds,Value=500

The following is example output.

{
    "Attributes": [
        {
            "Key": "tcp.idle_timeout.seconds",
            "Value": "500"
        }
    ]
}