Vector PC-Duo Installation Guide download pdf (Page 25)

PC-Duo Overview

Gateway (G)-managed connections from Master (M) to Host (H)

Firewall-friendly connections

When PC-Duo Master users need access to Hosts that are outside the domain, and/or

behind a firewall or NAT-device, normal peer-to-peer or Gateway-managed connections

will not work. In these cases, it is difficult to find and maintain a secure remote support

connection because of dynamic port assignments and other network challenges.

For these situations, PC-Duo Gateway builds special firewall-friendly connections to

these Hosts. When Hosts are outside the domain, the Hosts are programmed to

automatically initiate contact with the Gateway. The Gateway will use this initial contact to

build a firewall-friendly connection to the Host. In this way, the remote Host outside the

domain will appear just like any Host inside the domain.

Terminal Services connections

PC-Duo provides server-side support (screen capture, input control, screen recording) for

session-based virtual desktops hosted by Terminal Services on Windows Server 2003 or

Window Server 2008 (now called "Remote Desktop Services"). Windows Server creates

and hosts the Terminal Services (TS) sessions like virtual machines. A presentation

technology using a display protocol such as RDP from Microsoft or ICA from Citrix is

typically used to remote the session display, as well as the keyboard and mouse input, to

and from an end user device (such as a thin client computer like a Wyse terminal).

PC-Duo allows technicians to capture (and if desired, record) the session presentation

information at the Windows Server before it is remoted to the end user device over the

RDP or ICA display protocol. PC-Duo is able to do this by injecting a Host instance into

each server-side TS session, which in turn captures and sends presentation information

directly to PC-Duo Gateway for recording and/or further transmission to a PC-Duo

Master.

Note: Because TS sessions are captured at the Windows Server (and not at the end user

device), PC-Duo Host effectively bypasses the technology used to remote the sessions to

the end users, and will therefore be compatible with Microsoft Terminal Services clients

as well as Citrix Presentation Server (now known as XenApp) clients.

Note: PC-Duo only supports TS sessions created on server-class Windows operating

systems such as Windows Server 2003 and Windows Server 2008.

See Terminal Services tab in PC-Duo Host Guide for more specific configuration and

setup information.

Root Host for TS sessions

The ―Terminal Services‖ feature of Windows Server 2003 and Windows Server 2008

allows multiple virtual desktop sessions to be active simultaneously. PC-Duo provides

remote access and remote control to these sessions on the Windows Server by injecting

a separate instance of the Host service into every new TS session. A special version of

the Host called the "root" Host must be loaded on the TS server (a "root" Host is a

standard Host with a special TS license key - see About tab in the PC-Duo Host Guide

for more information); it will automatically spawn new Host instances every time a new

TS session is created.

Transient Hosts

Each TS instance of the Host will have its own unique workstationID and must be

configured to report to a Gateway. When it first reports to the Gateway Server, it will be

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Vector PC-Duo Installation Guide Page 25

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