HP Universal Print Driver
I have been unable to find what the HP UPD uses to communicate with printers on their status. During a recent print server change over I took the opportunity to tidy up, standardise and lock down printer configs but one change seems to have stopped the driver from talking to select printers (P2055dn, 3015). Older printers such as the P2015dn are still fine.
Differences include the use of SNMPv3 instead of SNMP, https instead of http, protocols locked down and so on. Before I start undoing a lot of changes I was hoping someone may already know the answer so I can quickly rectify?