How do I check what systems are using my WiFi?

[SteveMcQ]

I've got a WiFi connection set up and it seems like something is using the wireless signal. How do I check what, if any systems/users, are stealing my signal?

I've set up WPA protection, but for some reason the Activity light on my modem still flashes on and off and the WLAN light (Linksys WRT54G) flickers on and off constantly. I've shut off every possible component in the household that could use the signal and yet it still does it. I'm getting a bit worried that somehow someone is still stealing my signal.

Suggestions? It's gotta be something else as I don't suspect the neighbors. One, they're kinda far to get a good signal and even if they could, I doubt they're technologically savvy enough to decrypt the wireless security as I always see the Geek Squad mobile coming to their house. Anyone who relies on BB guys to set up their tech doesn't worry me so much.

[Logain8955]

You need to go into your router. Type into your web browser 192.168.1.1. Put in your username/password. Now, you need to hunt around for something called your Active User List (or something like that. Each router is different, though the IP address above remains the same.) That will give you a list of every piece of hardware connected to your system.

[Oktoberfest]

well, I don't think it's always 192.168.1.1, mine was 192.168.0.1, anyway go to run and type in cmd and in there type ipconfig and look at the Default Gateway

[epobirs]

Open a Command window and use IPCONFIG to find out your gateway IP address. That will be your router address.

WiFi is constantly checking for new connections in range, so there will always be the appearance of activity.

If you want to absolutely lock out unauthorized users, set up MAC filtering so the only your own equipment can talk to the router.

[Wolfpup]

If you want to absolutely lock out unauthorized users, set up MAC filtering so the only your own equipment can talk to the router.

No! Dosen't work. I always thought that too, but it turns out that's completly worthless as a security precation-the MAC address can be easily detected and then spoofed, so MAC address filtering dosen't help any.

[AndrewCP]

Hey, if you got a DS and a game you can play online, you can check it on that too. Just set up a connection for your router or dongle and it'll let you check who's using the WiFi as well.

[Aberforth]

once you get to your router settings, click on Status. then Local Network and theres on button called DHCP Client Table, click on that. a pop up window will open up showing you who's on your network. however, i don't think it shows people with a static ip address.

[Liquid 2]

I believe that Trend Micro's PC-Cillin will alert you to the existence of unauthorized users on your network.