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I have three computers in my house: One desktop (wired), and two laptops (wireless).
I'm using Cox Communications, and yesterday they had a major outage. I know it was them because I called them up when I started losing connection to the internet.
Now, all the computers can connect just fine but they don't have internet access. It just says "local only". The weird thing is, some of them work occasionally.
For the first day my laptop was working perfectly, while all the other computers couldn't connect. Later on in the day it got reversed, and the desktop was the one with internet access. By the second day the problem on Cox's end was fixed, but we still had no access.
I called them up and they reset my modem, and did the usual troubleshooting stuff. It never fixed the problem, but we found out that the problem had to do with conflicting IP addresses.
My router was a Linksys WRT54G and it was about 5 years old. I figured it might have gotten damaged from the outage since it was so old, and now it's having trouble "fixing itself" and giving out the proper IP addresses. So I bought a new router, a Cisco Linksys E1000. I set everything up, and still the same problem.
My computer has access right now (that's how I'm writing this), but no other computers seem to be able to get access. Is there possible damage to the modem? Can someone help me please? Sorry for this being so long.
This answer was very helpful, thanks. It seemed to eventually fix itself on its own. I put my old router back in and all the computers connected perfectly. Apparently the network card in the Vista laptop wasn't supported by the E1000. So that explains why that one computer wouldn't work, but that doesn't explain how they all connected on the old router. Technological mystery I guess :P – Anthony – 2011-03-18T02:30:20.590