There are many ways to provide layered security for your wireless home network, with the most effect method is to use the strongest encryption that is available. For many home wireless routers, that would be WPA2.
But another often over looked security setting, is the capability of disabling access to your Linksys web-based administration interface when connecting via wireless connection.
If you allow anyone to connect to your wireless router (such as in a public area), or you just don't trust your neighbors, you can disable wireless access to the router's administration web-based Utility.
Doing so, will prevent any wireless user from taking over control of your router, and locking you out or making changes that will leave your network vulnerable.
This means that you will only be able to access the administration utility via a wired connection. In some cases this may be exactly what you want (and need for an added layer of protection).
Before you make any changes to your wireless router configuration, back it up. To do so, follow these steps to back up your linksys wireless router configuration.
Once that is completed, make sure you are connected to your router using a wired connection. Then in the administration utility, click on the Administration tab.
NOTE: Screen shots are from Linksys WRT54G wireless router. Your router interface may look different.
Now, in the Web Access section check the Disabled box next to Wireless Access Web: (also make sure HTTPS is checked) and click the Save Settings button at the bottom of the page.
After saving the changes, verify that you cannot connect to the administration utility over a wireless connection (be sure to disconnect the wired connection first).
Now you can be sure that no one can make any changes to your router configuration unless their computer is physically connected (wired) to your router.