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  • Your machine might not be requesting one, if you're in Windows have you tried "troubleshooting" the connection to get an IP?
    – Steven Evers
    Commented Apr 15, 2011 at 17:06
  • We have two computers. One is on the USB the another one is on the ethernet link. After the modem reset the first one that's turned on got an ip address and the other just won't get. I'm using linux and windows dual boot. None of the OS-es can get address.
    – Calmarius
    Commented Apr 15, 2011 at 17:30
  • 1
    Since your ISP seems to have screwed up your device, you should call them, ask them to fix it, and invoice them for any time and costs incurred by you rectifying the problem. Unless of course what you're trying to do is against their terms of service.
    – Robin Green
    Commented Apr 15, 2011 at 19:30
  • 1
    Are we talking about public IPs or private IPs? Is your modem in bridged or routed mode? using pppoe? What I suspect is that you are talking about public IPs and your ISP probably only has one assigned to your circuit, meaning if you don't NAT, you only get a single device connected at any time.
    – MaQleod
    Commented May 31, 2011 at 6:51