HP Remote Graphics Software 5.4.0 User Guide

devices are denied attachment. The ACL file, which resides on the Remote Computer, supports
allowing/denying USB device attachments based on the following nine USB descriptor fields:
1.
Device Class
2.
Device Subclass
3.
Device Protocol
4.
Vendor ID
5.
Product ID
6.
Device BCD
7.
Manufacturer
8.
Product Type
9.
Serial Number
USB device mounting can also be allowed/denied based on the following two parameters:
10.
IP address of the Local Computer
11.
The domain group of the local user
The ACL file supports two rule types: “allow” and “deny”. The rules are evaluated by the Remote
Computer for each USB connection request from a Local Computer as follows:
●
If any rule indicates the USB connection should be denied, the connection is denied, regardless of
any other rule.
●
If any rule indicates the USB connection should be allowed, and if there are no rules that deny the
connection, the connection is allowed.
●
If no rules match at all, the connection is denied.
Therefore, a deny rule takes precedence over an allow rule. The ACL file is implemented as an XML
(Extensible Markup Language) file. The ACL schema file is located at:
C:\Program Files\Hewlett-Packard\Remote Graphics Sender\hprUsbAcl.xsd
For backwards compatibility, the following default ACL file(installed during Sender installation) allows
all USB connections to be made:
C:\Program Files\Hewlett-Packard\Remote Graphics Sender\hprDefaultUsbAcl.xml
The names for these files can be changed using the properties described in
Sender USB access control
list properties on page 178. The default ACL file contains the following contents, which allows all USB
connections to be made:
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?> <hprUsbAcl> rule type="allow">
<name>Allow all USB devices (HP default)</name> </rule> </ruleset> </hprUsbAcl>
The following example ACL file denies all remote USB attachment requests:
<hprUsbAcl> <ruleset> <rule type="deny"/> </ruleset> </hprUsbAcl>
120 Chapter 6 Advanced capabilities ENWW