Vector PC-Duo Installation Guide download pdf (Page 33)

PC-Duo Overview

PC-Duo networking features

PC-Duo remote desktop solutions support several standard transport protocols for

computer-to-computer communication, and two types of network addressing schemas.

Network protocols

PC-Duo products support most of the standard networking and transport protocols,

including:

IP: IP is a general-purpose protocol supported on a wide variety of networks and

servers. PC-Duo components support communications using either the TCP or UDP

transport protocols running over IP. PC-Duo has established the following standard ports

for use with either TCP or UDP:

PC-Duo Host listens on port 1505 by default

PC-Duo Gateway listens on port 2303 by default

SSL: The SSL protocol runs above TCP/IP and below higher-level protocols such as

HTTP or IMAP. Using TCP/IP on behalf of the higher-level protocols allows an SSL-

enabled server to authenticate itself to an SSL-enabled client, and then establish an

encrypted connection between the remote computers.

By default, PC-Duo Gateway listens for incoming SSL connections on port 443,

but it might be appropriate to note that this can be easily changed to avoid conflicts

with other server software installed on the same machine.

The PC-Duo Gateway now ships with a Gateway Certificate Manager to manage

the creation and/or selection of a SSL security certificate for the PC-Duo Gateway.

Network addressing schemas

The PC-Duo UDP, TCP and SSL transport protocols support the use of either IPv4 (32-

bit) or IPv6 (128-bit) addresses.

Wake-on-LAN support

PC-Duo can be used to "wake-up" remote computers that have been shut down

(sleeping, hibernating, or soft off; i.e., ACPI state G1 or G2), with power reserved for the

network card, but not disconnected from its power source. The network card listens for a

specific packet containing its MAC address, called the magic packet, that is broadcast on

the subnet or LAN.

In order to execute this feature, both the MAC address and the last known IP address of

the remote computer must be known. Since the PC-Duo Gateway knows both of these

pieces of information, it is in a position to send the Wake-on-LAN signal.

PC-Duo implements this functionality in Gateway-managed connections in two ways:

Implicit Wake-on-LAN: If Gateway is asked to make a connection to a remote

computer and the last status indicates that the remote computer is "Offline", the Gateway

will automatically attempt to wake up the remote computer by sending appropriately

configured WOL signal. If the remote computer was shut down in a state capable of

receiving WOL signal, it will wake up and report to the Gateway and a connection will be

established.

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Vector PC-Duo Installation Guide Page 33