Hopefully I have this right, but in answer to your questions, using MAC
filtering is supposed to keep other MAC addresses from accessing your
router. As was mentioned, this can be faked, but it certainly helps. There
is also something called 802.1x which is think is more secure by needing
some type of smart card or other ID device.
In order to keep your "over the air" information from being read you need to
encrypt it using WEP or WAP or something. Otherwise someone that is able to
receive your signal can read it. If it is encrypted, they can still receive
it, but hopefully not read it. I am not sure what the procedure is at Hot
Spots to keep things private, but if you ever go to one you might check. I
remember sitting in a car outside my daughter's house and happened to turn
on my laptop and did a scan. Up popped someone's network and the router was
wide open. They still had the original SSID name and password. Of course
since I have the same router at home, I could have done all sorts of bad
things.

This was just after Christmas, so I assumed the person had not
yet learned about wireless security.
Clark
"Sam Lewis" <> wrote in message
news:...
> Hi All
> I have some confusion regarding "access" vs "eavesdropping" and how best
> to
> configure my wireless network.
>
> I have just set up a wireless home network (XP pro desktop and laptop,
> netgear wireless router and Intel PRO/Wireless 2915 Dual Band 802.11a/b/g
> 54Mbps MiniPCI Wireless Card ). I have logged into the router and
> specified the MAC address of my wireless card.
>
> 1)Does this mean no one else can access my network to send and receive
> data?
> 2) Does this mean that no one else can "see" what I am sending and
> receiving
> (as they have no access)?
> 3) Are "authentication" key and " WEP encryption" required if you have
> limited your wirelsss lan to known MAC addresses?
>
> TIA
>
> Sam
>
>
>