HP DesignJet and HP PageWide XL Printers - Security Features
HP DesignJet Printer Series Security Settings
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3. When the user is logged in, select the Network tab.
For HP printers the user has to apply some changes in the default Netgard MFD configuration:
Netgard IP Address: 192.168.245.1
Subnet Mask: 255.255.255.0
Copier IP Address: 192.168.245.30
4. Go to Advance Configuration and check that the DHCP server is enabled.