> ## Documentation Index
> Fetch the complete documentation index at: https://docs.usenubis.com/llms.txt
> Use this file to discover all available pages before exploring further.

# Listeners

> Configure the traffic entry points that tell a Nubis load balancer how to accept and forward requests.

## Listeners define how traffic enters the service

A listener describes the port, protocol, and forwarding behavior used by the load balancer. It is the layer that turns a public or internal endpoint into an actual application path.

## Listener design questions

* Which ports should accept traffic
* Which protocols the service needs
* Whether TLS should terminate at the load balancer
* Which backend group should receive that traffic

## Good listener habits

* Keep listener configuration aligned with the application deployment model.
* Review listener rules when domains, certificates, or backend ports change.
* Avoid leaving old listeners active after migrations or cutovers.