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accessing an HP printer on wan side of hardware firewall

Last Modified: 2016-04-21
we're in a location with a single cable modem / router.  Then each tenant connects to that router with their own router / firewall to keep the other tenants out.

There's a shared printer (HP officejet Pro 8620) on the shared LAN (

We can print to it from our LAN ( but can't access it for scanning either from the computer's HP scan app nor from the control screen of the printer (it had been on the subnet originally so when you go into scan / to computer, we see our computer).

Is there a way to get to scan to / from the printer across the firewall?
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