Problem with a wifi printer

Hi people !

I’m sorry about my english but I hope you will understand me !

I have a notebook with Comodo Firewall and a wifi printer. I can not print from the notebook because the firewall blocks something, I’m sure that the problem is the firewall because disconnecting it, I can print !
I don’t know how to solve it. Can you help me ?

I have found the solution in another post of this forum:

Thank you very much !!!