you can use (adding mac address option ) some times when u buy router the defult IP address came with it is 192.168.1.1 or 192.168.1.254 then maybe anybody can configure his laptop with te same subnet mask and ping to your router ,after that he can change all your configuration and he can also change password, in that case you must reset you router from back side . but to let you router safety
firstly .. change the IP address fro your route for example : 18.104.22.168
then go to filter option and enable MAC address option ,open your laptop or your desktop machine if you connect wirless adapter . open start >> run>> write cmd >> then write >> ipconfig /all >>
then you will see more information about your machine ,from wirless adapter detail >> you will find the MAC address fro your wirless adapter , write it on paper then go to the router and save the MAC address in the list >> then clcik save... if you want add another laptop just do the same steps.
in this case you machine wil be more saftey and you will add teh machines you need only ..
any help send me ..
Eng.mohannad azzam /network administrator