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I set my Thomson router to forward all internet traffic to a single machine. To do this, I connected to the router wirelessly at 192.168.1.254 and then changed the settings. Now, I want to undo this, but 192.168.1.254 is not connecting (I think it's looking for this address on the outside world?) How do I connect to the router wirelessly?

When I go to System Preferences, AirPort, Advanced, TCP/IP, I see that my IPV4 address is the same IP address that whatismyip.com reports, my subnet mask is 255.0.0.0, and there's an IP address for "Router". But, navigating to router never connects. (Of course the router is working since I have wireless internet access through it.)

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write the ip addresses of routers and your machine...You might be in a different subnet... –  Vineet Menon Apr 23 '12 at 9:52
    
@VineetMenon: Isn't that risky with my NAT open and no firewall? Both my router and my machine have the same first three numbers, but a different final number. –  Neil G Apr 23 '12 at 9:53
    
okay....but don't worry..ur IP might not be public for someone to hack onto your system. Anyways, since your first three numbers are same It should be in same subnet, assuming your subnet mask is 255.255.255.0. –  Vineet Menon Apr 23 '12 at 9:56
    
My subnet mask is 255.0.0.0, but I don't know what that means. How should I connect to it? –  Neil G Apr 23 '12 at 10:00
    
You can check these things, 1. try pinging your router. If it succeeds, then mostly your router is not allowing config page access via wireless. else you cannot ping it then the subnetting might be the issue. –  Vineet Menon Apr 23 '12 at 10:00

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