We want to have a guest network for our congregation here. What I would like to do is put another router onto our Comcast modem just for the guest network. But before I go too far down that road, I would like to know from someone that knows about Comcast modems if it is even possible to have two routers hooked into the same Comcast modem. We have a Comcast business account with a SMC Networks modem that has 4 Ethernet ports. Any advice would greatly appreciated. We presently have one router that goes from the modem to our network switches. The other modem I want to add will just go to the Comcast modem for Internet access. The router I want to add is a D-Link DIR-615 with DD-WRT loaded on it.