HP JetAdvantage Security Manager 10 Device E-LTU Manual de usuario descargar pdf (Pagina 79)

Web Services Print (WS-Print)

A network printing protocol used on Windows Vista and later systems. This protocol can safely be

disabled if Windows Vista or later systems are not used.

Windows Vista was the first Microsoft Windows operating system to provide Web Services on

devices as a connection protocol for printing and scanning peripherals. The computer uses the Web

Service function of Windows Vista or later to automatically detect the device connected to the network

(WS-Discovery) and easily install the device as a Web Service printer. WS-Print is based on the Web

Services common framework for describing and sharing information, including a set of protocols for

consuming and controlling services on these network-connected, Web Service enabled devices. Web

Services for Description Language (WSDL) is the XML format for describing these network services.

A WS-Print job is based on the Web Services for Devices (WSD) Printer Job Object schema and

consists of a print ticket that describes the job. Job processing and document processing attributes

are also included in the print ticket. A WS-Print compatible printer must conform to the WSD Printer

Service schema and provide elements that describe the printer itself, printer configuration, printer

status, print job status and document properties. The print service deploys an “eventing” model to

inform the print job control point when the device configuration changes, when the device condition

changes, and when there is a job progress update.

In web services frameworks, XML documents are passed from client to server in the form of a SOAP

request. XML is then processed within the web service, possibly opening it up to a variety of XML

based attacks. However, as is the case with WS-Discovery, the most common security exploit

scenario requires an attacker to know the target’s unique WSD address, a value that is automatically

sent in the UDP broadcast to port 3702. It is recommended to disable WS-Print, if not needed for

direct client printing.

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HP JetAdvantage Security Manager 10 Device E-LTU Manual de usuario Pagina 79