Securing Your Router Against Wireless Hack Programs
As usual, I wait until you're worried to spit out the tips. Note that in general, you cannot fully protect yourself as long as your wireless Internet is up and running. You can certainly make it really annoying for anyone to try and hack your wireless router though.
The first one is to set up a good encryption key on your router. As I covered, WEP and WPA-PSK have been fairly well cracked. Pick the highest encryption settings possible. Preferably something with 128-bit encryption. As a side note, do not leave it public. That is just crazy, unless you really want to provide a hotspot for the neighborhood. You just have to set up the encryption key once and then look it up anytime you need to add a new device. It's not a big deal and most routers hold your hand during setup.
By setting up a good encryption key, you're ahead of them game. You don't need to outrun the bear, you just have to outrun the guy next to you. If you're well encrypted, then they probably won't waste their time on your router.
While you're at it, change the password on the router. Don't just leave it as admin:admin, or whatever your default is. There are several lists out there that cover all of the default passwords for routers. If early efforts fail, then the next step for wireless hacking is to see if the password is still the default. If it is, then they can gain access to the router itself and just copy the encryption key that way.
The next step is to check your router's other settings. Can you set it up to only allow a few authentication attempts before it shuts down or locks the new person out? If so, then do it. That will prevent brute force efforts. One incredibly handy function is MAC filtering. Each computer has a unique MAC address and some routers allow you to only allow access to certain named MAC addresses. If you can do this, turn it on and only allow your few devices. This is probably the best protection that you can realistically get without much effort. If their MAC address is locked out and the router's password is something difficult, then they will definitely move on to easier routers. It is possible to make their MAC address look like something different and even mimic yours, but it's another annoyance for them.
Finally, if you're really worried, then remember to shut off and unplug your router when you aren't using it. You'll save a few pennies on the power bill and it will be pretty hard to hack a wireless network that isn't online. If you're really concerned about wireless password sniffer hack tools getting ahold of your Internet connection, then it's a good safety step.