I am not sure what exactly to do. This is the first place I went to for some advice. I just bought the Linksys EZXS88W Router. My PC connects to it fine from the Cable Modem, but when I plug the XBOX 360 in at the same time in a different port on the router, Microsoft is telling me that I dont have a valid IP Address. Is this a firewall problem or what? I am really into PC's and what not, but have never ventured into the realm of networking and internet connections. If anyone could help me out, that would be outstanding....please
No. The EZXS88W is a switch/hub. Not a router. You connect all devices directly to the internet. Your ISP only lets you use a single IP address at a time. You'll need a wired or wireless router not a switch to share a single public IP address with multiple local devices.