# Windows Server Requirements

All Parallels RAS server components are Windows Server based, with the exception of Parallels HALB appliance and VDI virtual appliances.

## **RAS Connection Broker and RAS Secure Gateway (64-bit versions only)**

RAS Connection Broker and RAS Secure Gateway are supported on the following operating systems:

* Windows Server 2016 up to Windows Server 2022
* On Windows Server 2016, 2019, and 2022 both Server Core and Desktop Experience installations are supported

{% hint style="info" %}
**Note:** RAS Connection Broker and RAS Secure Gateway should not be installed on a domain controller or any other machine where a DHCP server is running. This in general applies to any of the RAS components.
{% endhint %}

## **RAS Web Administration Service**

Same OS requirements as for RAS Connection Broker (see above). Note that for larger environments (2000 or more concurrent connections), it is recommended to install the component on a dedicated server. For details, please see <https://kb.parallels.com/en/124988>.

## **RAS RD Session Host Agent**

RAS RD Session Host Agent is supported on the following operating systems:

* Windows Server 2012 R2 up to Windows Server 2022
* Windows Server 2016 and newer must be installed using the "Desktop Experience" installation option.
* Windows Server 2012 R2 — Server Core installation option is not supported.

## **RAS Provider Agent**

* Windows Server 2016 up to Windows Server 2022

For the list of supported VDI providers, see **RAS Provider Agent Installation Options**.

## **RAS Guest Agent**

* Windows Server 2008 R2 up to Windows Server 2022
* Windows 10 up to Windows 11

## **Remote PC Agent**

* Windows Server 2012 R2 up to Windows Server 2022
* Windows 10 up to Windows 11

## **Parallels RAS PowerShell**

* Windows Server 2016 up to Windows Server 2022
* Windows 10 up to Windows 11
* Windows Management Framework 3.0 and .NET Framework 4.5.2 must be installed

## **Parallels RAS Console**

* Windows Server 2016 up to Windows Server 2022
* Windows 16 up to Windows 11

## **RAS Enrollment Server**

* Windows Server 2012 R2 up to Windows Server 2022

### RAS Performance Monitor <a href="#ras-performance-monitor" id="ras-performance-monitor"></a>

* Windows Server 2016 up to Windows Server 2022

For complete software requirements, please see the **Parallels RAS Administrator's Guide** (the **Software Requirements** section). To view and download the guide, please visit <https://www.parallels.com/products/ras/resources/>.

## **Active Directory**

Parallels RAS can be installed using Active Directory or Local Windows Security.

* VDI for RAS requires Active Directory.
* Installation of any RAS component on an Active Directory Domain Controller is not supported.

If using Active Directory, Windows Servers must be joined to a Domain and the right hostname configured before installing RAS.

* Do not change the server hostname after installing Parallels RAS or reconfiguration of Parallels RAS would be required.

## **Networking Requirements**

Use a static or permanently reserved DHCP address.

SSL on the Gateway servers requires name resolution. For Gateways to function properly, one of the two following conditions must be met:

* DNS resolution must be available.
* HOSTS files can be configured for DNS resolution.

See the [**Active Directory and Infrastructure Services Considerations**](https://docs.parallels.com/landing/ras-best-practices-guide/active-directory-and-infrastructure-services-considerations) chapter.

## **Windows Firewall Requirements**

RAS v15 and higher can automatically configure Windows Firewall settings during installation or deployment of additional RAS farm components to allow communication between different RAS servers in a farm.

* For manual configuration of the Windows Firewall, do not check the "Add Firewall Rules" when deploying RAS components.
* A comprehensive list of required Firewall ports can be found in the Port Reference section of the Parallels RAS Administrator’s Guide, which can be download from <http://www.parallels.com/products/ras/resources/>.

When pushing RAS components to another server from the RAS console, one of the following conditions must be met on the remote server:

* Open Windows Firewall ports TCP 135, 445, 49179, then push the RAS components and have the Windows Firewall ports automatically configured.
* Temporarily disable Windows Firewall, push the RAS components and have RAS automatically configure the firewall settings, and then re-enable the Windows Firewall.
* Manually configure Windows Firewall settings as described in the Port Reference section of the Parallels RAS Administrator's Guide, and then install the RAS component(s).

## **HALB requirements**

The below highlights the prerequisites required to use HALB:

* Firewall or router in front of a HALB configured to preserve the source IPs of client devices