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Expand Up @@ -30,7 +30,11 @@ You need to set up two important parts, regardless of the CDN provider you use:

## Set up

Follow the directions listed for CloudFront or use your own CDN setup. Once you complete those steps and verify that your proxy works for both `cdn.segment.com` and `api.segment.io`, [contact Segment Product Support](https://segment.com/help/contact/) with the following template email:
There are 2 options you can choose from when you set up your custom domain proxy.
1. [CloudFront](#cloudfront)
2. [Custom CDN or API proxy](#custom-cdn--api-proxy)

Follow the directions listed for [CloudFront](#cloudfront) or [use your own CDN setup](#custom-cdn--api-proxy). Once you complete those steps and verify that your proxy works for both `cdn.segment.com` and `api.segment.io`, [contact Segment Product Support](https://segment.com/help/contact/) with the following template email:

```text
Hi,
Expand All @@ -51,6 +55,58 @@ A Segment Customer Success team member will respond that they have enabled this
> info ""
> The **Host Address** field does not appear in source settings until it's enabled by Segment Customer Success.


## Custom CDN / API Proxy

### Snippet instructions
If you're a snippet user, you need to modify the [analytics snippet](/docs/getting-started/02-simple-install/#step-1-copy-the-snippet) that's inside your `<head>`.

To proxy settings and destination requests that typically go to `http://cdn.segment.com`, replace:
```diff
- t.src="https://cdn.segment.com/analytics.js/v1/" + key + "/analytics.min.js"
+ t.src="https://MY-CUSTOM-CDN-PROXY.com" + key + "/analytics.min.js"
```

To proxy tracking calls that typically go to `api.segment.io/v1`, replace:
```diff
- analytics.load("<MY_WRITE_KEY>")
+ analytics.load("<MY_WRITE_KEY>", { integrations: { "Segment.io": { apiHost: "MY-CUSTOM-API-PROXY.com" }}})
```

### npm instructions
See the [`npm` library-users instructions](https://www.npmjs.com/package/@segment/analytics-next){:target="_blank"} for more information.

Proxy settings and destination requests that typically go to `http://cdn.segment.com` through a custom proxy.

```ts
const analytics = AnalyticsBrowser.load({
writeKey,
// GET http://cdn.segment.com/v1/projects/<writekey>/settings ->
// https://MY-CUSTOM-CDN-PROXY.com/v1/project/<writekey>/settings
// GET https://cdn.segment.com/next-integrations/actions/...js ->
// https://MY-CUSTOM-CDN-PROXY.com/next-integrations/actions/...js
cdnURL: 'https://MY-CUSTOM-CDN-PROXY.com'
})
```

Proxy tracking calls that typically go to `api.segment.io/v1` by configuring `integrations['Segment.io'].apiHost`.
```ts
const analytics = AnalyticsBrowser.load(
{
writeKey,
cdnURL: 'https://MY-CUSTOM-CDN-PROXY.com'
},
{
integrations: {
'Segment.io': {
// POST https://api.segment.io/v1/t -> https://MY-CUSTOM-API-PROXY.com/t
apiHost: 'MY-CUSTOM-API-PROXY.com' // omit the protocol (http/https) e.g. "api.segment.io/v1" rather than "https://api.segment.io/v1"
}
}
}
)
```

## CloudFront

These instructions refer to Amazon CloudFront, but apply more generally to other providers as well.
Expand Down