I would post this in the peripherals section, but this is more of a networking question anyways. So the airport extreme/tc only has 3 lan ports, that blows. I have 3 devices that need ethernet+ a network printer. I currently live in apartment with a crap isp forced down my throat. ethernet in the walls, internal network, no public IP. I am going to try and get a public IP soon, however there is certain traffic i want to keep within the apartment network and not public. what i've devised to do is do (wall -> wrt610n -> airport -> clients). problem is that i need another ethernet port for the printer, luckily my wrt610n has 4 of them. i was going to run from the wall into the wrt's wan, then out from one of the ports on the wrt into the airport's wan. this way i can run a proxy server on the wrt and direct traffic into the apartment network and have all other traffic forwarded to the airport. my question is how can i plug the printer into the wrt and still have it on my lan, behind the airport. here is a basic drawing of how my network is setup i'm guessing I can assign the printer a static IP and keep it on my lan's subnet and it should work, but i've never done this before so I'm trying to make sure i can get this to work before i drop money.