• Introduction
• Add domain to Cloudflare
• Configure DNS records
• Create a Cloudflare Worker
• Configure the Worker script
• Add custom domain to Worker
• Test the community portal
• Related resources
• References

Introduction

We provide a simple, PHP-based reverse proxy script for hosting community portals from any web server. You'll find this index.php file on the Installation tab of your community portal configuration. This is useful for testing; allowing you to serve a community portal from a directory on an existing website, or from the built-in PHP webserver.

However, you can also use Cloudflare Workers¹ to serve community portals. This approach leverages Cloudflare's global edge network and provides excellent performance and reliability. With this approach you can completely ignore the index.php script.

Add domain to Cloudflare

First, you'll need to add your domain to Cloudflare:

1. Log into your Cloudflare dashboard
2. From the Add menu in the top right, click Connect a domain
3. Enter your root domain
4. Select the desired DNS option
5. Select the desired AI Crawlers option
6. Choose your plan (Free plan works fine for most use cases)

Configure DNS records

Complete the domain activation by changing your domain's nameservers to the ones provided by Cloudflare.

Create a Cloudflare Worker

Navigate to the Workers section in your Cloudflare dashboard:

1. Click on your account name in the top left.
2. In the left sidebar, click Compute → Workers & Pages
3. Click Create application
4. Select Create Worker
5. Choose "Start with Hello World!"
6. Enter a worker name (e.g., cerb-cloud-proxy)
7. Click Deploy

Configure the Worker script

After deployment, click Edit code and replace the default script with the following:

export default {
  async fetch(request, env) {
    const backendHost = 'example.cerb.me';
    
    const portalRouting = {
      '/support': 'a1b2c3d4'
    };

    let backendUrl;
    const url = new URL(request.url);
    const newHeaders = new Headers(request.headers);
    newHeaders.set('DevblocksProxyHost', request.headers.get('Host'));

    for(let portalPath in portalRouting) {
      if(!backendUrl && url.pathname.startsWith(portalPath)) {
        const pathName = url.pathname.substring(portalPath.length);
        backendUrl = `https://${backendHost}/portal/${portalRouting[portalPath]}${pathName}${url.search}`;
        newHeaders.set('DevblocksProxyBase', portalPath);
        break;
      }
    }

    if(!backendUrl)
      backendUrl = `https://${backendHost}${url.pathname}${url.search}`;
    
    const modifiedRequest = new Request(backendUrl, {
      method: request.method,
      headers: newHeaders,
      body: request.body,
      redirect: 'manual'
    });
    
    const response = await fetch(modifiedRequest);
    return response;
  }
};

Modify the variables in the script:

• backendHost is the domain where you're hosting your Cerb installation (e.g., example.cerb.me for Cerb Cloud).
• portalRouting maps URL paths to portal codes. The keys are the URL paths (e.g., /support) and the values are your portal's unique ID, which you can find in Search » Portals.

Click Deploy to save your changes.

Add custom domain to Worker

Now you need to connect your domain to the Worker:

1. In the left sidebar, click Compute → Workers & Pages
2. Click on your worker name
3. Go to Settings → Domains & Routes
4. Click Add → Custom domain
5. Enter your full domain (e.g., support.example.com)
6. Click Add domain

Cloudflare will automatically create the necessary DNS records and SSL certificates.

Test the community portal

Open your community portal URL in a web browser to verify it's working correctly.

The Worker will:

• Proxy requests to your Cerb backend
• Handle SSL termination automatically
• Set the appropriate headers for Cerb to recognize the portal
• Route different paths to different portals if configured

Related resources

• Create a new Support Center community portal
• Host community portals using Nginx

References