On 1/18/23 2:46 PM, Robert Marcano wrote:
On 1/17/23 8:19 AM, Zdenek Dohnal wrote:
> Well in a matter of speaking this is doable even without IPP-USB
> advertised device. Every application can just send data to printer's
> port and IP or get USB interface handler and talk with the device via
> USB. Even an application which implements IPP client can omit CUPS and
> talk with IPP printer directly. In cases where application generates a
> printer ready file (f.e. in PCL format) which have all user's option
> applied already is desired to bypass CUPS and talk with the printer -
> I've heard there are such applications already bypassing CUPS, because
> they want to pass such a file.
>
> So it is not something uncommon in my opinion.
Forgot to add this:
USB device access can be protected with filesystems permissions, so it
is possible to protect direct access if some installation requires it.
Way easier than firewall rules IMHO.