On 02/25/2018 10:42 AM, François Patte wrote:
I opened firefox on one computer and miracle: the printer attached
the other computer is discovered and cups admin interface asks me if I
want to add this printer. Nice: the job is easy!!*But* this does not
work at all!!
If I recall correctly, discovery is a matter of multicast DNS
announcement. Since the source announces the printer, firewall rules
don't need to be adjusted to allow that. However, you do need to adjust
firewall rules to allow incoming IPP connections. Have you done that?