depends on the make and model - you will find a user manual on site for the major makes and most models which provides full details on how to configure a router
if you post the make and model and exactly what you are trying to do with the wifi ( change channels - set password) then a member here should be able to help
if you post the make and model and exactly what you are trying to do with the wifi ( change channels - set password) then a member here should be able to help