HP Web JetAdmin 10.4 SR6 device communication errors

[Gianluca_Croci]

Good Morning,

we've about 600 HP Laser printers and we're increasing security by turning off unused features and activating the HTTPS protocol to connect to the printer (always active).

I noticed, however, that by activating this protocol, then on the JetAdmin I've an Error "Device Communication Error" with the printer, as if it were off, but in reality it's ON and I can reach it via browser without problems.

I found a page where it said to delete the "Panther" folder from "C:\Program Files\HP Inc\Web JetAdmin 10\HPWSProAdapter\FileSystems\MachineData", and to run Discovery again, but without success.

Elsewhere to regenerate the printer certificate, but same result as before.

SNMP = "Enable SNMPv1/v2 read and write access", without any password setting, or "Enable SNMPv1/v2 read and write access (use 'public' as community name Get)", identical result.

Any idea that will allow us to have these printers active again in JetAdmin?

Thanks in advance.

Kind regards

[Repairatrooper]

If you are turning on HTTPs then you will likely need to ensure that the security certificates are properly installed on printer and Webjetadmin, refer to this security document for details.

http://h10032.www1.hp.com/ctg/Manual/c01840730

[Gianluca_Croci]

Thanks for the reply.

We have around 600 printers of different models, ranging from 10-12 year old models to more recent ones. The printers are located in various locations, and have IP addresses of different ranges. How can I issue a certificate that is suitable for everyone?
I looked in JetAdmin and did not find the possibility of having multiple certificates (one per printer).