I was under the impression that port 631 was used to iPrint printers.
Well, we have firewalled our server, open ports that we determined that
were necessary for iPrint, NetStorage etc.

iPrint was working before the firewall. After some digging (netstat -an)
we found that iPrint uses other ports? TCP ports 1500-2000? Is there a
specific range for iPrint we need to open for it to work outside the firewall?