[SOLVED] HP printer unavailable with firewalled.

globetrotterdk · 03-21-2024, 10:57 AM

I have installed firewalld on my Debian 12 install and opened up ports 631 and 9100 on both tcp and udp, like I do when running Fedora, for my HP printer. The printer is a driverless HP Color LaserJet Pro M453. I have not changed any settings on the printer, for a very long time. Yet the system can't find the printer either for setup or printing. I have confirmed that the problem is firewalld, by running:

Code:

$ sudo systemctl stop firewalld

Then I was able to configure the printer. Now that I have firewalld back on, I can't print to the printer, and I get a "no suitable host found" error.

Is there something that Debian 12 does differently with firewalld, or the ports that printers connect to the system on?

michaelk · 03-21-2024, 02:21 PM

It depends on how strict are your firewall settings. Are you using IPP everywhere printing? Do you have a URL like
ipps://HPA8B13BBAA8DA.local:631/ipp/print

You might need to open mDNS port 5353 UDP. cups uses cups-browsed and/or avahi to automatically find printers which uses mDNS.

globetrotterdk · 03-21-2024, 04:56 PM

Quote:

Originally Posted by michaelk

It depends on how strict are your firewall settings. Are you using IPP everywhere printing? Do you have a URL like
ipps://HPA8B13BBAA8DA.local:631/ipp/print

You might need to open mDNS port 5353 UDP. cups uses cups-browsed and/or avahi to automatically find printers which uses mDNS.

Thanks for the reply. The connection is listed as "implicitclass://HP_Color_LaserJet_Pro_M453_4_E70F39/". The listing is the same in KDE printers section, as well as when I go into CUPS http://localhost:631/printers/