Listeners for your Gateway Load Balancers
When you create your Gateway Load Balancer, you add a listener. A listener is a process that checks for connection requests.
Listeners for Gateway Load Balancers listen for all IP packets across all ports. You cannot specify a protocol or port when you create a listener for a Gateway Load Balancer.
When you create a listener, you specify a rule for routing requests. This rule forwards requests to the specified target group. You can update the listener rule to forward requests to a different target group.
To update your listener using the console
Open the Amazon EC2 console at https://console.aws.amazon.com/ec2/
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In the navigation pane, under Load Balancing, choose Load Balancers.
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Select the load balancer and choose Listeners.
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Choose Edit listener.
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For Forwarding to target group, choose a target group.
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Choose Save.
To update your listener using the AWS CLI
Use the modify-listener command.
