When I first put in wireless for the house so I could use my laptop and so I would not have to wire my wife's areas, I did not secure it at first. I was just worried about getting the signals right. Then the performance dropped. OK, I have a hard wired machine on the desk and that ran fine so I started looking for the problem. One of the items on the list was to look for how many machines were connected. I had two extra machines on the wireless than I had in the house with wireless cards and one of those was not even on at the time. My wife could not get to the web sites that she wanted and when she did (at long last get there about 30 minutes later) she could not get the next page.
Long story short, I secured the connection and the following day my next door neighbor complained that someone had turned off his free Internet connection. His whole family were using it and now it was secured and wouldn't let them in to their Internet.
I told him the story about the three freeloaders that were camped out on my connection and how I had to secure the wireless just so my wife and I could get to web sites that we wanted. He said that it was WEP protected and he was going to get a WEP cracker. I upped the security levels later that day. He finally got his own Internet connection.
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