wireless network problem with pic.

[The_Lyrics]

ok, so i think other people may be trying to jack my internet connection
so i wanted to know if there was like any programs that i could get to see whos like trying to connect to my internet connection
i know i put a WPA-PSK key which you need to connect with my internet connection. i need some help cause i'm worried right now.
how can i keep my connection safe from other people trying to connect to the internet with my connection

 

[LA1]

one way is to see if your router has mac table filters. You enter the mac addresses of all you want to connect, the rest are kept out.
You are safe with WPA, Make sure it is on. If you have 54g , 20m or so is just used for signalling the rest of the bandwidth is left for the user.

 

[The_Lyrics]

is there a way to check if my wpa is active?