I have a printer connected to one iMac and a second iMac connected through the airport network. It all works fine. I turned off the first iMac firewall and Littlesnitch and turned on the Norton Mac IS firewalls (connection and application) but lost the ability to print from the second iMac. I continued unable to print even after I turned these two firewalls off.
I noticed the name of the first iMac had changed with an added number in a parenthesis but I was not able to print even after I changed the second iMac's name in the printer preferences or following that by making them both exactly the original name (followed by computer resets). Finally, I deleted the printer (at the network connected iMac) and added it back, after which I was able to print over the network although without the Norton firewalls.
What are the explicit instructions for using shared printing and these Norton firewalls?