How can i login to my router.?

I tried to enter the ip on my browser(192.168.0.1) (192.168.1.1) but failed, i tried to reset my router but failed,when i right this ip on cmd it says host unreachable.My problem is not the id or p i know it but my problem is i cannot open my router setup.i m using linksys it is not even appearing on my network settings. i want ur guys help to solve this mess up oh one thing i forgot i want to open my nat type thats y i want to login to my router.Plz help me i would very thankful.