On Sun, 14 May 2023 19:48:07 +0200
john doe <johndoe65...@mail.com> wrote:

> On 5/14/23 19:29, Charles Curley wrote:
>  [...]  
> 
> The below, is what I would try:
> 
> - On the non-working client, Are you restricting outbound traffic at
> all

Not that I know of.

> or for testing  purposes can you disable the FW?

I shut the firewall down ("systemctl stop firewalld"), ran test pages.
Same non-results, except that system-control-printer now reports:

Idle - Print job canceled at printer.


I tried increasing the logging, which involved stopping and restarting
the cups service. In the process of doing that, the client and server
both managed to forget the printer. I re-installed it. On the server, I
have one instance of the printer, protocol:

hp:/usb/HP_LaserJet_MFP_M232-M237?serial=VNB4J02590

On the non-working client, cups discovered two versions of the printer:

dnssd://HP%20LaserJet%20MFP%20M234sdw%20(C0FB67)._ipp._tcp.local/?uuid=d532fa73-f559-43ca-9f8e-1eef16972345

ipps://HP%20LaserJet%20MFP%20M234sdw%20(C0FB67)._ipps._tcp.local/

I have been testing both and getting the same results.

> 
> - How are the working clients connected to the printer (protocol
> wise)?

implicitclass://HP_LaserJet_MFP_M234sdw_C0FB67_/


> - Is the non-working client using that same protocol?

Clearly not.

So I had the working client discover the printer again. It offered the
same two as I have on the non-working client. Both printed test pages.

ipps://HP%20LaserJet%20MFP%20M234sdw%20(C0FB67)._ipps._tcp.local/

dnssd://HP%20LaserJet%20MFP%20M234sdw%20(C0FB67)._ipp._tcp.local/?uuid=d532fa73-f559-43ca-9f8e-1eef16972345


> - If you do not use MDNS and point manually to the server, does it
> work any better?



I tried setting up a printer manually on the non-working client.

ipp://hawk.localdomain/printers/HP_LaserJet_MFP_M232-M237

No test page, and I got:

Processing - The printer may not exist or is unavailable at this time.

However, I checked the CUPS on-line documentation, and did not find any
documentation on how to set up a URI, so it's possible I did that
incorrectly.

I also enabled "port 9100" printing on the printer, and went directly to
it:

socket://hpm234ethernet.localdomain:9100

The printer spun its wheels, reported an error and stopped without
printing. Nothing in the event log.


> 
> --
> John Doe
> 



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