I have a Westell model A90-210030-04 modem. I am interested in buying a router for the hardware firewall but if I'm understanding everything correctly that I've been reading about it online, I will have a problem. From what I understand, this modem has a router in it but it doesn't have the firewall. According to what I've been reading, if this is true, the two routers will have conflicts. I have searched online but haven't found anything that gives a definite answer. Does anyone know the answer to this? Does this modem have a router in it? And if so, is another router just asking for trouble? Thanks for your time!