> For the complete documentation index, see [llms.txt](https://docs.parallels.com/landing/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.parallels.com/landing/ras-reference-architecture/deployment-scenarios/parallels-ras-deployment-scenarios/single-farm-with-dual-ras-secure-gateways.md).

# Single Farm with Dual RAS Secure Gateways

This scenario enables high availability for client connections using RAS connection settings on either the Parallels Client side or round-robin DNS.

To enable high availability for client connections using RAS connection settings, the Parallels Client should be configured to connect to primary and secondary Secure Gateways using the primary and secondary connection settings in the RAS connection properties. In this case primary and secondary RAS Secure Gateways must be configured to connect to the same RAS Connection Brokers (using Advanced Client Gateway Settings). When the Primary RAS Secure Gateway is not available, Parallels Clients can connect to the farm using the Secondary RAS Secure Gateway. The client settings can be applied either centrally (via Client Policy in the RAS Console) or manually.

To enable high availability for client connections using round-robin DNS, two new host records must be created in the DNS forward lookup zone with the same name (e.g. myhost.example.com) but with two different IP addresses of primary and secondary RAS Secure Gateways.

{% hint style="info" %}
**Note:** Round-robin DNS load balancing between two Secure Gateways works for the TCP protocol only. UDP load balancing may not work properly.
{% endhint %}

<figure><img src="https://content.gitbook.com/content/jRndoUJVjRrmCN0WR7H6/blobs/WiZdB2cmV6zGaRitQ49v/singlefarmwithdualrassecuregateways.png" alt="Single Farm with Dual RAS Secure Gateways"><figcaption></figcaption></figure>

## **Installation Notes**

RAS Connection Broker is installed using the Parallels RAS installer (standard installation).

All other components are push-installed from the RAS console.


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