HP LaserJet Pro 400 M401 - Software Technical Reference

Network Diagnostic Utility (NDU)
Network Diagnostic Utility is a downloadable tool to help identify and fix common problems when
installing or using HP products on your home network. The NDU guides you through the following
troubleshooting steps:
●
Identify network and Internet connection problems.
●
Identify communication problems between the product and the network.
●
Check for required HP software to connect your product over the network.
●
Troubleshoot firewalls blocking communication.
For detailed instructions and to download the NDU, go to
http://h10025.www1.hp.com/ewfrf/wc/
document?docname=c02037530&lc=en&dlc=en&cc=us
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