HP Officejet Pro and Officejet printers Series - IT Administrators Install Guide

• {Program Files}\HP\{Model Name}\bin\ScanToFolderWizard.exe

• {Program Files}\HP\{Model Name}\bin\ScanToEmailWizard.exe

Technical Details

Web Services Discovery (WSD)

The HPNetworkCommunicator.exe uses Web Services Discovery (WSD) to communicate with our

devices during and after installation. When searching for a device, we send either multicast or

unicast UDP packets. Once the device receives the probe, it will respond to the software on a port in

Microsoft Windows’s ephemeral port range 49152-65535 with pertinent information.

Search Protocols (UDP/TCP)

When searching for a list of devices, WSD initiates a multicast (UDP) probe to IP 239.255.255.250 at

port 3702. Once the device is installed and before every device operation, for example, print, scan,

or fax, we check to see if communication can be established. We call this action “rediscovery”; to do

the rediscovery WSD sends a multicast UDP packet to resolve the IP address of the device.

When searching for a device using the IP address, WSD creates a TCP socket over port 80. This is

usually only done under specific circumstances. See below.

Windows XP Users

Windows XP does not support the standard WSD protocol. We have developed an internal solution

that operates almost identically to the way it’s implemented for Windows Vista, Windows 7, and

Windows 8. The main difference is when you are searching for a device by IP address. For an IP

address-initiated search under XP, we will send out unicast UDP probes.

Installing by providing an IP Address

If you are installing via the command line and you provide an IP address to the command line, we

use the IP address to find your device. However, for rediscovery purposes, we will attempt a

unicast UDP probe or a TCP connection (to port 80). Your firewall software might block this type of

activity. You will have to create a rule for the HPNetworkCommunicator.exe for it to establish

communication.

If you are installing via the graphical user interface and your device cannot be discovered through

the multicast probe method, you will have the option to install the device by providing the IP

address. If you get the option of installing by IP, it means that either your firewall is blocking the

traffic or your network does not support multicasting. From the software’s perspective it is the

same thing. If it is a firewall issue and your device is on the same subnet as the computer, we

recommend creating rules in your firewall software to allow for multicast probes from the

HPNetworkCommunicator.exe. See Multicast Discovery

for more information.