---
title: "Deploy Addition Domains"
description: "Extra Railway/custom domains for your container"
category: "Other"
url: https://railway.com/deploy/addition-domains
---

# Deploy Addition Domains

Extra Railway/custom domains for your container

**[Deploy Addition Domains on Railway](https://railway.com/template/addition-domains)**

- **Creator:** Lê Quang Huy's Projects
- **Category:** Other
- **Total deploys:** 1

## Template content

### Railway-Addition-Domains

- **Source:** lequanghuylc/Railway-Addition-Domains
- **Public domain:** Yes

## Documentation

# Deploy and Host Addition Domains on Railway

Each service/container on Railway only supports 1 public railway domain (xxx.up.railway.app). This one gets you another, by using reserve proxy

## About Hosting Addition Domains

You will need to have your main container/service up and running first. after that use this template as a reserve proxy layer

## Common Use Cases

- You container might have multiple process running in multiple ports, you can use this to expose all that process to public
- Get more custom domains than what you have with your current plan

## Dependencies for Addition Domains Hosting

None - Addition Domains comes ready to use with the standard configuration.

### Deployment Dependencies

- Public Networking (HTTP proxy): https://docs.railway.com/guides/public-networking

### Implementation Details

- Deploy your main container/service first, it will have private/local domain
- Use that and setup env variable for Addition Domains

## Environment variables

### Required
Set at least one upstream:
- `DEFAULT_UPSTREAM`, or
- at least one of `PROXY_ROUTE_1` ... `PROXY_ROUTE_5`

`DEFAULT_UPSTREAM` format:
- `scheme://host:port`

`PROXY_ROUTE_x` format:
- `domain=scheme://host:port`

Examples:
- `DEFAULT_UPSTREAM=http://192.168.1.10:3000`
- `PROXY_ROUTE_1=app.example.com=http://192.168.1.10:3000`
- `PROXY_ROUTE_2=admin.example.com=http://192.168.1.11:8080`

### Optional
- `CLIENT_MAX_BODY_SIZE` (default: `5G`)
- `DEFAULT_UPSTREAM` acts as the default route when host doesn't match any `PROXY_ROUTE_x`


## Why Deploy Addition Domains on Railway?


Railway is a singular platform to deploy your infrastructure stack. Railway will host your infrastructure so you don't have to deal with configuration, while allowing you to vertically and horizontally scale it.

By deploying Addition Domains on Railway, you are one step closer to supporting a complete full-stack application with minimal burden. Host your servers, databases, AI agents, and more on Railway.


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