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

# Lumos IP addresses

## Background

If your app is behind a firewall and only accepts traffic from allowlisted IP addresses, this article provides the current list of IPs that the Lumos app uses to communicate with external services.

## Outbound IP addresses

All outbound traffic from the Lumos application will come from one of the following IP addresses: **44.228.74.159** or **54.244.99.235**.

Please allowlist both of these IP addresses in your application or service provider to ensure that traffic from Lumos is not blocked by your service.