Xerox 5775, 5790, 5745 System Software Structure, Purpose, Hardware, Control and Data Interfaces

XEROX WorkCentre 5735/5740/5745/5755/5765/5775/5790 Information Assurance Disclosure Paper

Table 8 User Interface memory components

2.6.Marking Engine (also known as the Image Output Terminal or IOT)

2.6.1.Purpose

The Marking Engine performs copy/print paper feeding and transport, image marking and fusing, and document finishing. Images are not stored at any point in these subsystems.

2.6.2. Hardware

The marking engine is comprised of paper supply trays and feeders, paper transport, laser scanner, xerographics, and paper output and finishing. The marking engine contains a CPU, BIOS, RAM and Non-Volatile Memory.

2.6.3. Control and Data Interfaces

Images and control signals are transmitted from the copy controller to the marking engine across a proprietary interface.

2.7.System Software Structure

2.7.1.Open-source components

Open-source components in the connectivity layer implement high-level protocol services. The security-relevant connectivity layer components are:

•Apache 2.2.11, with mod_ssl integrated (http and https)

•PHP 5.3.1

•OpenSSL 0.9.8l (SSL)

•SAMBA 3.0.30 (SMB)

•Netsnmp 5.0.9 (SNMPv3)

2.7.2.OS Layer in the Controller

The OS layer includes the operating system, network and physical I/O drivers. The controller operating system is Wind River Linux, kernel v. 2.6.20+. Xerox may issue security patchesfor the OS, in which case the Xerox portion of the version number (i.e.. after the ‘+’ sign) will be incremented.

The crypto library for IPSec is provided by the kernel.

IP Filtering is also provided by the kernel.

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