How to block my roommate from accessing my wireless network?

They're getting the password when you change it, probably, because your router doesn't have its password set. There's two passwords that are important. One for the router itself, protecting its internal settings and another PW for the wireless network that's really about the connections to the wireless and wireless encryption.

If I log into my router with a browser, it asks for a password. I had to enable this. By default, all the settings were accessible just by typing the router address in the browser window. If there's no password on the router itself, then he just has to log into the router and read the password.

So, set a password on the router only you know, then change the Wifi password. He'll be locked out of the network AND locked out of the router. Often, cable modem or DSL, you can call your ISP and they'll help you with setting a password on the router and changing your WiFi router.

However, physical access will always win. There's a recessed button on the back somewhere that'll reset all settings in the router. Press this and he can reset everything back to factory defaults and just set himself up again.

Better to make a truce with the guy.

To a degree, so what? It's not like the router is going to run out of bytes or something. Get a couple bucks a month from him to share the service and you'll save money and headaches.

Change the password one more time, but this time, reboot the router COLD. In other words, unplug it, wait 30 seconds, and then plug it back in. What's happening is your roommate is already connected, and you need to "boot" him out, which turning off the router, after a password change will do.

Also, you want to make sure that the router's access does not have the "default" password, also. So you need to change TWO PASSWORDS. One for the wireless and one for access to the router. That should keep your roommate out.

I hope this helps.

Turn on Firewall, and you may also be able to block his IP, through the Default Gateway (open up cmd.exe on a windows, and type ipconfig /all; look for your internet adapter, and find the default gateway; open up that adress on a browser; look up how to change the settings on your specific model of router). You could also report him, if he's hacking through your network. Supposedly he could get arrested.

Charburg is on the right track. once you are in the setup interface for your router you want to look for MAC ID filtering. You can specify which MAC ID(s) you will allow on your wi-fi. Enter yours so you can get on. Then make sure you have the router physically sheltered. If he can access it he can use its reset button to undo anything you have done to secure it.

Sit his *** down n' tell his *** what tha **** up. Break his hairy legz if necessary. Or just sneak into his laptop and make it forget your network and then change your password.

Change your password and tell him you through away the password after putting it into your computer and saving it and realy put it somewhere he never looks