Finding a security code for my router box

[lamar1]

Hello,
i ought my router box from a man atwork and i dont know the security code. how can i find it so myeighbors cant hack into my internet

 

[Emerald]

http://www.tomshardware.com/forum/31382-43-find-security-password-wireless-router

should this not help you might want to list which type of router you have.