Split DNS is the preferred method of accessing your Horizon Cloud Service environment when users are connecting from inside and outside your network. Split DNS enables users on your local network to connect through the internal network to a private IP address, and external users can connect to a public IP address while using the same URL. This method simplifies end-user access by not having to use two URLs, one for internal and the other for external.
When setting up split DNS, create a new host (A Record) that points to the virtual IP of the internal Unified Access Gateways in a specific DNS forward lookup zone on your internal DNS servers. The DNS forward lookup zone is based on your current DNS configuration. If you have the same internal DNS name as you do externally, you create the A Record in the forward lookup zone. If you do not have the same internal DNS name as you do externally, or if you are using the Horizon Cloud Service URL, you create a DNS stub zone with forward lookup that matches the external fully qualified domain name. Then create the A Record in the forward lookup zone.