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Parallels RAS 19 Administrator’s Guide

Introduction

Welcome to Parallels® Remote Application Server (Parallels RAS), an integrated solution to virtualize your applications, desktops and data. Parallels RAS publishes applications and delivers remote and virtual desktops to any device on your network, anywhere.

Parallels RAS 19 release history

The following table lists the Parallels RAS 19 release history. Parallels RAS documentation is updated for every release. This guide refers to the latest Parallels RAS 19 release from the table below. If you are using a newer Parallels RAS release or version, please download the current version of the guide from https://www.parallels.com/products/ras/resources/.

19.0

Initial release

07/27/2022

19.0

Update 1

08/31/2022

19.0

Hotfix 1

09/16/2022

19.0

Hotfix 2

09/30/2022

19.0

Hotfix 3

10/14/2022

19.1

Update 2

11/15/2022

19.2

Update 3

07/06/2023

19.3

Update 1

11/06/2023

19.4

Update 2

06/08/2024

About Parallels RAS

Parallels RAS provides vendor independent virtual desktop and application delivery from a single platform. Accessible from anywhere with platform-specific clients and web enabled solutions, like the built-in Parallels Web Client, Parallels RAS allows you to publish remote desktops, applications and documents, improving desktop manageability, security and performance.

Parallels RAS extends Windows Remote Desktop Services by using a customized shell and virtual channel extensions over the Microsoft RDP protocol. Parallels RAS supports all major hypervisors from Microsoft, VMware, and other vendors including Hyperconverged solutions such as Nutanix AHV (AOS) and Scale Computing and Cloud platforms and services such as Microsoft Azure and Azure Virtual Desktop (formerly known as Windows Virtual Desktop), enabling the publishing of virtual desktops and applications to Parallels Client.

The product includes powerful universal printing and scanning functionality, as well as resource-based load balancing and management features.

With Parallels Device Manager Module for Parallels RAS you can also centrally manage user connections and PCs converted into thin clients using the free Parallels Client.

How does it work?

When a user requests an application or a desktop, Parallels RAS finds a least loaded RD Session Host or a guest VM on one of the least loaded Providers and establishes an RDP connection with it. Using Microsoft RDP protocol, the requested application or desktop is presented to the user. Note that in addition to RD Sessions Hosts and VDI, Parallels RAS can also be used to configure, manage and publish Azure Virtual Desktop resources.

Users can connect to Parallels RAS using Parallels Client (available at no charge), which can run on Windows, Linux, macOS, Android, Chrome, iOS and iPadOS. Users can also connect via an HTML5 browser or Chromebook.

As newer versions of Windows keep on being developed as time goes by, you need to defend the migration cost to your business. Parallels RAS can help. Desktop replacement allows you to extend the lifespan of your hardware and delay migration to the latest OSs to a time that suits you best. The Parallels RAS solution allows you to be very flexible: you can lock machine configurations on the user side, placing your corporate data in an extremely secure position; or you can opt to allow users to run some local and remote applications. Parallels Client Desktop Replacement is able to reduce the operability of the local machine by disabling the most common local configuration options, while guaranteeing the same level of service and security afforded by thin clients, directly from your existing PCs.

About this guide

This guide is intended for system administrators responsible for installing, configuring, and administering Parallels RAS. This guide assumes that the reader is familiar with Microsoft Remote Desktop Services and has an intermediate networking knowledge.

About Parallels RAS

The product includes powerful universal printing and scanning functionality, as well as resource-based load balancing and management features.

With Parallels Device Manager Module for Parallels RAS you can also centrally manage user connections and PCs converted into thin clients using the free Parallels Client.

How does it work?

Terms and abbreviations used in this guide

Note: Starting with Parallels RAS 19, all products and documentation, including this section, use updated terminology. To see what terms were changed, go to https://kb.parallels.com/en/128943.

Term/Abbreviation

Description

RAS Console

Parallels RAS Console.

The RAS console is the primary interface you use to configure, manage, and run Parallels RAS. As an administrator, you use the RAS console to manage Farms, Sites, RD Session Hosts, published resources, client connections, etc.

Category

In the RAS console, categories are displayed in the left pane of the main window. Each category consists of a number of settings related to a specific task or operation.

The categories include Start, Farm, Load Balancing, Publishing, Universal Printing, Universal Scanning, Connection, Device Manager, and others.

Farm

A Parallels RAS Farm is a logical grouping of objects for the purpose of centralized management. A Farm configuration is stored in a single database which contains information about all objects comprising the Farm. A Farm consists of at least one Site but may have as many sites as necessary (see Site below).

Site

A Site consists of at least one RAS Connection Broker, RAS Secure Gateway (or multiple gateways), and RAS agents installed on RD Session Hosts, Providers, and Windows PCs. Note that a given RD Session Host, Provider, or PC can be a member of only one Site at any given time.

Licensing Site

The Site that manages Parallels RAS licenses in a Parallels RAS Farm. By default, the server on which you install Parallels RAS becomes the Licensing Site. If you create additional sites later, you can designate any one of them as the Licensing Site.

There can be only one Licensing Site in a given Farm. All other sites are called secondary sites.

Note: Parallels RAS updates or upgrades must be applied to the Licensing Site first.

RAS Secure Gateway

RAS Secure Gateway tunnels all traffic needed by applications on a single port and provides secure connections.

Web Client

Web Client allows users to view and launch remote applications and desktops in a web browser. The Web Client functionality is a part of RAS Secure Gateway.

Publishing

The act of making items installed on a Remote Desktop Server, Provider or Remote PC available to the users via Parallels RAS.

RAS Connection Broker

RAS Connection Broker provides load balancing of published applications and desktops.

RAS RD Session Host Agent

RAS RD Session Host Agent collects information from Microsoft RDS hosts required by the Connection Broker and transmits to it when required.

Remote PC Agent

Remote PC Agent collects information from Remote PC hosts required by the Connection Broker and transmits to it when required.

RAS Guest Agent

RAS Guest Agent collects information from the VDI desktop required by RAS Connection Broker and transmits to it when required.

RAS Provider Agent / RAS Provider Agent

RAS Provider Agent collects information from the Parallels RAS Infrastructure and is responsible for controlling VDI through its native API. RAS Provider Agent is built into the RAS Connection Broker and is available by default. It can be used to control multiple Providers in a Parallels RAS Farm.

RAS Provider Agent is the same as RAS Provider Agent, but the term is used in the context of Azure Virtual Desktop (described at the end of this table).

RAS Provider Agent dedicated

RAS Provider Agent dedicated is similar to the RAS Provider Agent described above with one important difference — it is a separate component that must be installed from the Parallels RAS installer and can only control a single Provider.

RDSH or RD Session Host

RDSH makes applications and a full desktop accessible to a remote client that supports Remote Desktop Protocol (RDP). RDSH replaced Terminal Servicer beginning with Windows 2008 R2.

HALB

High Availability Load Balancing (HALB) is an appliance that provides load balancing for RAS Secure Gateways. Parallels HALB virtual appliance is available for the following hypervisors: Hyper-V, VMware. Multiple HALB Virtual Servers representing different HALB devices can be deployed in a single Site. Multiple HALB deployments can run simultaneously, one acting as the primary and others as secondaries. The more HALB deployments a Site has, the lower the probability that end users will experience downtime. Primary and secondary HALB deployments share a common or virtual IP address (VIP). Should the primary HALB deployment fail, a secondary is promoted to primary and takes its place.

Tenant Broker

Tenant Broker is a special RAS installation that hosts shared RAS Secure Gateways. It is an essential part of the RAS multi-tenant architecture.

Tenant