PCoIP Zero Client and Host Administrator Guide (Issue 5)

used for PCoIP technology, see Knowledge Base support topic 15134-114 on the Teradici
support site.
9.6.1 UDP-encapsulated ESP Packet Format
UDP-encapsulated ESP is the default packet format for Tera2 devices with firmware 4.1.0
installed. It is also used for Tera1 devices with firmware 3.x+ installed that connect
remotely via a View Security Gateway.
The UDP-encapsulated ESP packet format is illustrated in the figure below. This figure also
shows the location of the PCoIP transport header in a UDP-encapsulated ESP packet.
Figure 5-2: UDP-encapsulated ESP Packet Format
9.6.2 IPsec ESP Packet Format
IPsec ESP encapsulation is the default packet format for direct connections that involve a
Tera1 zero client and/or Tera1 host card.
The IPsec ESP packet format is illustrated in the figure below. This figure also shows the
location of the PCoIP transport header in an IPsec ESP packet.
Figure 5-3: IPsec ESP Packet Format
9.7 Syslog
The syslog protocol is a standard for logging program messages to a database. It is
commonly used to monitor devices that do not have a large amount of storage capacity, such
as networking devices, ESX servers, zero clients, and PCoIP host cards. Using syslog for
logging allows you to centralize the storage of log messages and to capture and maintain a
longer history of log data. It also provides a set of tools to filter and report on syslog data.
Syslog messages include a facility level (from decimal 0 to 23) that indicates the application
or operating system component that is generating the log message. For example, a facility
level of "0" indicates a kernel message, a facility level of "1" indicates a user-level
message, and a facility level of "2" indicates a message from a mail system. Processes and
daemons that have not been explicitly assigned a facility may use any of the eight "local
use" facilities ("16 – local use 0" to "23 – local use 7") or they may use the "1 – user-level"
facility. Facilities allow for easy filtering of messages generated by a device.
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PCoIP® Zero Client and Host Administrator Guide