Architecture Planning

Table Of Contents
Tunneled Client Connections with Microsoft RDP
When users connect to a remote desktop with the Microsoft RDP display protocol, Horizon Client can make
a second HTTPS connection to the View Connection Server host. This connection is called the tunnel
connection because it provides a tunnel for carrying RDP data.
The tunnel connection offers the following advantages:
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RDP data is tunneled through HTTPS and is encrypted using SSL. This powerful security protocol is
consistent with the security provided by other secure Web sites, such as those that are used for online
banking and credit card payments.
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A client can access multiple desktops over a single HTTPS connection, which reduces the overall
protocol overhead.
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Because View manages the HTTPS connection, the reliability of the underlying protocols is significantly
improved. If a user temporarily loses a network connection, the HTTP connection is reestablished after
the network connection is restored and the RDP connection automatically resumes without requiring
the user to reconnect and log in again.
In a standard deployment of View Connection Server instances, the HTTPS secure connection terminates at
the View Connection Server. In a DMZ deployment, the HTTPS secure connection terminates at a security
server or Access Point appliance. See “Preparing to Use a Security Server,” on page 80 for information on
DMZ deployments and security servers.
Clients that use the PCoIP display protocol can use the tunnel connection for USB redirection and
multimedia redirection (MMR) acceleration, but for all other data, PCoIP uses the PCoIP Secure Gateway on
a security server or Access Point appliance. For more information, see “Client Connections Using the PCoIP
Secure Gateway,” on page 74.
For more information about Access Point virtual appliances, see Deploying and Configuring Access Point.
Direct Client Connections
Administrators can configure View Connection Server settings so that remote desktop and application
sessions are established directly between the client system and the remote application or desktop virtual
machine, bypassing the View Connection Server host. This type of connection is called a direct client
connection.
With direct client connections, an HTTPS connection is still made between the client and the View
Connection Server host for users to authenticate and select remote desktops and applications, but the second
HTTPS connection (the tunnel connection) is not used.
Direct PCoIP connections include the following built-in security features:
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PCoIP supports Advanced Encryption Standard (AES) encryption, which is turned on by default, and
PCoIP uses IP Security (IPsec).
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PCoIP works with third-party VPN clients.
For clients that use the Microsoft RDP display protocol, direct client connections to remote desktops are
appropriate only if your deployment is inside a corporate network. With direct client connections, RDP
traffic is sent unencrypted over the connection between the client and the desktop virtual machine.
Chapter 5 Planning for Security Features
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