Custom Domains GA docs [DOC-980]

src/_data/products.yml

@@ -186,6 +186,15 @@ items:
 - product_display_name: OAuth 2.0
   slug: oauth-2
   plan-note: "OAuth 2.0 is available to customers on Business tier plans."
+  plans:
+    free: false
+    team: false
+    business: true
+    add-on: false
+
+- product_display_name: Custom Domain
+  slug: custom-domain
+  plan-note: "Custom Domain is available to customers on Business tier plans."
   plans:
     free: false
     team: false

src/_data/sidenav/main.yml

@@ -150,8 +150,10 @@ sections:
       title: Cloud Sources
     - path: /connections/sources/debugger
       title: Source Debugger
-    - path: /connections/sources/custom-domains
-      title: Set Up a Custom Domain Proxy in Segment
+    - path: /connections/sources/custom-domain
+      title: Segment-Managed Custom Domain
+    - path: /connections/sources/catalog/libraries/website/javascript/custom-proxy
+      title: Self-Managed Custom Proxy
     - path: /connections/sources/visual-tagger
       title: Visual Tagger
     - section_title: Schema

src/_data/sidenav/strat.yml

@@ -109,7 +109,7 @@ sections:
   - path: /connections/sources/catalog/libraries/website/javascript/quickstart
     title: Quickstart tutorial
   - path: /connections/sources/catalog/libraries/website/javascript/custom-proxy
-    title: Custom proxy for Analytics.js
+    title: Self-Managed Custom Proxy
   - path: /connections/sources/catalog/libraries/website/javascript/persistence
     title: Client-side persistence in Analytics.js
   - path: /connections/sources/catalog/libraries/website/javascript/single-page-apps

src/_includes/content/domain-delegation-solutions.md

@@ -0,0 +1,11 @@
+## Segment's domain delegation solutions
+
+Segment offers two domain delegation solutions: [Custom Proxy](/docs/connections/sources/catalog/libraries/website/javascript/custom-proxy) and [Custom Domain](/docs/connections/sources/custom-domain). If you use Custom Domain, you can choose to use either DNS delegation or a Cannonical Name (CNAME). Segment recommends using Custom Domain with DNS delegation, which leads to easy setup, maintenance, and monitoring. 
+
+| Service | How it works | Infrastructure management | Availability |
+| ------- | ------------ | ------------------------- | ------------ |
+| Custom Domain with DNS Delegation | A Segment service that allows your website to use your own subdomain to load Analytics.js securely over HTTPS and send event data. It is not limited to Analytics.js and is also compatible with server libraries. It uses a DNS subdomain that you delegate to Segment.<sup>*</sup> | **Segment manages all related infrastructure**, including applying security updates, managing the SSL certificate lifecycle, and monitoring. | Business Tier <br><br> Recommended for reliable data collection. |
+| Custom Domain with CNAME | This approach uses a Canonical Name (CNAME) to map an alias name on your domain name to Analytics.js. It is not limited to Analytics.js and is also compatible with server libraries. | Customers are responsible for maintaining CNAME. | Business Tier <br><br> Not recommended due to evolving and persistent browser privacy measures. |  
+| Custom Proxy | This approach uses a proxy or wrapper where all data is first collected by a proxy on your domain and then forwarded to Segment. | Customers are responsible for maintaining their own proxy infrastructure. | Available to all Segment users. <br><br> Not recommended because it adds a point of failure, but remains an option if Custom Domain with sub-domain delegation is unavailable to you. | 
+
+<sup>*</sup>_If it's not possible for you to delegate subdomains to Segment, you can use a CNAME instead. Segment encourages users to delegate a DNS subdomain rather than use use CNAME aliasing due to the evolving privacy standards in browsers, but CNAME aliasing remains an option for users not interested in using nameservers._

src/connections/sources/catalog/libraries/website/javascript/custom-proxy.md

@@ -1,16 +1,21 @@
 ---
-title: Self Hosting or Proxying Analytics.js
+title: Self-Managed Custom Proxy
 redirect_from: '/connections/sources/custom-domains/'
 strat: ajs
 ---
 
-Custom domains allow you to proxy Analytics.js and proxy all tracking event requests through your domain.
+Custom proxies allow you to proxy Analytics.js and all tracking event requests through your own domain.
 
-You cannot use custom proxy setup for Analytics.js CDN or Tracking API with device-mode destinations because it requires the destination's native scripts are loaded onto the client, and the requests are sent directly to the destination. 
+You cannot use custom proxy setup for Analytics.js CDN or Tracking API with device-mode destinations because it requires that the destination's native scripts are loaded onto the client, and the requests are sent directly to the destination.
+
+> info "Business Tier customers can also use Custom Domain"
+> Custom Domain is a fully-managed service that enables you to configure a first-party subdomain over HTTPS to track event requests through your domain instead of tracking events through Segment's default domain. For more information, see the [Custom Domain](/docs/connections/sources/custom-domain) documentation. 
+
+{% include content/domain-delegation-solutions.md %}
 
 ## Custom Proxy prerequisites
 
-To set up a custom domain, you need:
+To set up a custom proxy, you need:
 
 - Access to your site DNS settings
 - A CDN you can serve assets from
@@ -20,7 +25,7 @@ To set up a custom domain, you need:
 > info "Custom Proxy Troubleshooting"
 > If you experience issues configuring a custom proxy, contact your organization's IT department for help. Segment does not have access to the resources you need to configure a custom proxy.
 
-This guide explains how to set up a custom domain in CloudFront. You can apply these principles to almost any modern CDN that supports proxies.
+This guide explains how to set up a custom proxy in CloudFront. You can apply these principles to almost any modern CDN that supports proxies.
 
 You need to set up two important parts, regardless of the CDN provider you use:
 

src/connections/sources/custom-domain.md

@@ -0,0 +1,85 @@
+---
+title: Segment-Managed Custom Domain
+plan: custom-domain
+hidden: true
+---
+
+Custom Domain is a fully-managed service that enables you to configure a first-party subdomain over HTTPS.  You can then track event requests through your own domain (for example, `cdp.mydomain.com`), instead of the default (`segment.com`). Tracking events through your own domain allows for more secure and complete first-party data collection by reclaiming first-party data lost to browser controls. With a more complete view of your customer behaviors, you can build more robust profiles for greater attribution and ROAS.  
+
+
+![A graphic that shows how Internet traffic moves back and forth from your domain, to your custom domain, then to Segment's CDN and Ingest APIs.](images/custom-domain.png)
+
+> success ""
+> Segment recommends configuring Custom Domain alongside [Consent Management](/docs/privacy/consent-management/) to ensure you are respectful of your end users' consent preferences.
+
+{% include content/domain-delegation-solutions.md %}
+
+### How DNS subdomain delegation works
+DNS subdomain delegation is a process where the control of a specific subdomain is assigned to another DNS server, allowing that server to manage the DNS records for the subdomain. This delegation is useful for distributing the management of DNS records and enables specialized handling of subdomain traffic.
+
+### How CNAME records work
+When a user tries to access the alias domain, the DNS resolver looks up the CNAME record, finds the canonical name, and resolves it to the IP address of the target. For example, you could alias your subdomain to point to the Segment domain. If a user accesses your site, they are redirected to the Segment domain, but their browser's address bar still shows the alias domain.
+
+CNAME records provide flexibility and centralized management, making it easier to handle domain redirections and subdomain configurations. 
+
+Implementing a Custom Domain using CNAME delegation requires you to add a CNAME and record for two domains that Segment generates on your behalf: one for the Segment CDN and a second for the Tracking API. You must add a CNAME and DNS record for both domains. 
+
+## Supported sources
+
+Custom Domain supports the following sources: 
+- [Analytics.js](docs/connections/sources/catalog/libraries/website/javascript/)
+- [Clojure](/docs/connections/sources/catalog/libraries/server/clojure/)
+- [Go](/docs/connections/sources/catalog/libraries/server/go/)
+- [Java](/docs/connections/sources/catalog/libraries/server/java/)
+- [Node.js](/docs/connections/sources/catalog/libraries/server/node/)
+- [PHP](/docs/connections/sources/catalog/libraries/server/php/)
+- [Python](/docs/connections/sources/catalog/libraries/server/python/)
+- [Ruby](/docs/connections/sources/catalog/libraries/server/ruby/)
+- [.NET](/docs/connections/sources/catalog/libraries/server/net/)
+
+## Getting started
+
+> info "Custom Domain is only available to Business Tier customers"
+> Customers not on the Business Tier but who have interest in Custom Domain should [contact Segment's sales team](https://segment.com/demo/){:target="_blank”} for assistance with upgrading to a Business Tier plan. Segment also offers an alternative DNS record service, [Custom Proxy](/docs/connections/sources/catalog/libraries/website/javascript/custom-proxy/).
+
+To configure Custom Domain:
+1. Select the subdomain you'd like Segment to use for event request tracking (for example, `cdp.domain.com`).
+2. Sign into the Segment app, select your user avatar, and click **Contact Support**. 
+3. Create a support request with the following fields: 
+  - **Topic**: Select **Custom Domain**.
+  - **Subject**: Enter a subject line for your support request.
+  - **Domain Name**: Enter the subdomain that Segment should use for event request tracking.
+  - **Additional Domain Name**: If applicable, add an additional subdomain. This field is optional.
+  - **Source names**: Select the sources you would like to use for Custom Domain. For a list of all sources that support Custom Domain, see [Supported sources](#supported-sources).
+  - **Is the domain name enabled for Content Policy**: Select either Yes or No. You are not required to create a Content Policy prior to requesting Custom Domain. 
+  - **Description**: Enter an optional description for your service request. If you are requesting Custom Domain for multiple workspaces, enter any additional workspace slugs and source names into this field. 
+4. Segment provides you with a list of nameservers you should add to your DNS. Once you receive the nameservers from Segment, update your DNS. 
+5. After you've updated your DNS, Segment verifies that you've made all required updates and then provides you with two custom domains, one for the Tracking API and a second for your CDN. 
+6. Update your JavaScript snippet to reference the new subdomains or use the new Tracking API custom domain as your endpoint for server library sources. 
+
+## FAQ
+
+### What sources can I use with Custom Domain?
+Custom Domain was largely developed to support JavaScript sources. It helps with comprehensive collection of first-party data from your website when accessed over any platform (desktop, mobile, and more). You can use the subdomain for all other non-JavaScript sources as well, for consistency, but it will have no impact on data collection for those sources.  
+
+Once Custom Domain is enabled for your workspace, the Segment app generates a new JavaScript source code snippet for you to copy-paste into the header of your website. For non-JavaScript sources, you can use the sub-domain as an endpoint when using the Tracking API.
+
+### Is this a fully-managed solution? What servers or infrastructure do I need to set up on my side for this proxy? 
+Yes, Custom Domain is a fully-managed solution. 
+
+You must be able to delegate a DNS subdomain to Segment and add the name servers Segment provides to your DNS. 
+
+First, decide on your subdomain and then delegate it to Segment. Segment then asks you to add a DNS NS record to your DNS with specific values to complete the DNS delegation. From there on, Segment fully manages the infrastructure for serving Analytics.js and ingesting events data through the subdomain.
+
+### Can I change my Segment subdomain after the initial setup?
+Segment does not recommended that you change the subdomain after the initial setup. If you change the subdomain, Segment must revoke the older certificates for your subdomain and you are required to redo the entire onboarding process, as several underlying components, like certificates, would need to be recreated and reassociated. 
+
+### Who is responsible for managing the SSL certificate for the Custom Domain?
+Segment hosts and manages SSL Certificate on the Custom Domain. At this time, Segment does not support importing a certificate you may already have, as Segment must request a SSL certificate on your behalf using AWS Certificate Manager (ACM) when initially setting up your Custom Domain. 
+
+Segment also uses AWS Certificate Manager (ACM) to manage and renew certificates.
+
+### Can you rename `window.analytics` with Custom Domain?
+Yes, Custom Domain allows Segment to rename `window.analytics` to a unique name to avoid being blocked by some ad blocking software. 
+
+Customers who have access to the Custom Domain feature can rename analytics to `<workspaceid>/<sourceid>.js` by choosing an Alias for Analytics.js within the source settings that are available after the workspace is enabled for Custom Domain.