Printing Remotely - Multiple Solutions but This One was Smart

One of our clients connects remotely into 2 separate computers on two seperate computer networks. He connects remotely via Microsoft Windows Remote Desktop Connection(i.e. Terminal Services). They are interested in printing to their local printer remotely. The local printer is connected to the network via internet protocol. This client wanted to print to the IP printer that is on computer network "A" even when he is remotely logged into his pc on computer network "B". He has a universal print driver installed on both pc's, however it is the client version and not the server version so his printer cannot carry over to a separate computer network. In order to remedy this issue we created a rule in the firewall on computer network "A" that allowed the external I.P. address on port 9100 to translate to the networked printers I.P. address on the same port. Then I logged into his pc on network "B" and added the network printer using the external I.P. address of the computer network "A" and of course downloaded and installed the printer driver. The printer tested successful when printing from any other computer network! My only advise then is if you are doing this for yourself be sure that if there is any important information traveling between the remote computer network and your printer it should be encrypted.