Thread: How to check on my internet?!

After days of trying to correctly configure my modem "beetel - 450bx1 (bsnl account)" for both pc and wireless usage, I pat myself for successfully doing it. I referred a few topics here in this forum, and I am thankful it helped me give good idea about the whys and hows in my mind, considering I know only little about configuring and networking.
Well, since my wifi is on, I'm curious to know about how can I check if my bandwidth is under threat, whether anybody else is using my internet through wireless medium. Is there any way I can protect it, I agree there is this wep protection, but anything more powerful you may suggest?

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These topics will help ...

Wireless Security Primer
Wireless Security Primer - II

Thanks, I referred and configured it using the tips provided. Good work.