E4200 multiple unknown MAC's in filter list

I have a few desktops in my home network with a new E4200 router.
Have to add my wifes Lenovo notebook to the net and activated MAC filtering as addition to the WPA2.
Set her MAC address in the filter list. Only one MAC is allowed to access WLAN.
An hour later I see in the Filter list four (4) different and unknown MAC adresses added to the list. (???)
Do I have to worry? I removed them and all works well.

gv wrote:
somms wrote:
sabretooth wrote:
You don't need MAC filtering as it does nothing for security. As long as you have WPA2-AES you are good for the next 100 years.
This does not apply to the majority of Linksys/Cisco wireless routers w/gimped firmware unable to turn WPS off. Their WPA2-AES can be cracked in a couple hours easy...
That is not correct. You cannot crack WPA2-AES in a couple of hours. Reaver doesn't crack the WPA2-AES keys. It cracks the WPS PIN which allows you to retrieve the WPA2-AES directly from the router. WPS is like a backdoor into the router to retrieve the passphrase. WPA2-AES is still extremely secure. If you could disable WPS the WPA2-AES network would be perfectly secured.
WPA2-AES cannot be cracked at this time.
The wireless MAC filter generally doesn't provide security. MAC addresses are always transferred unencrypted thus they are very easy to find. I would not bother with the wireless MAC filter.
I think the appearing MAC addresses is a bug in the router firmware. But it's difficult to tell if you don't post the MAC addresses you have found...
This does not apply to the majority of Linksys/Cisco wireless routers w/gimped firmware unable to turn WPS off. Their WPA2-AES can be 'obtained' easily in a couple hours...
Thanks for pointing this out and I have amended my previous statement above!
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I looked through the NAC log again, and I did miss another piece of info, so here's how the log looks after adding the MAC in the filter list:
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to a determined hacker, MAC address filtering is a trivial security block to overcome (as you seem to have found out). You would be better, as Gandalf said, to disable SSID broadcast, and provide the SSID and WPA passphrase to anyone that you want to allow to connect to your network.
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gv wrote:
There is nothing like a "non-critial setup". It's enough to drive by with a car and within a few minutes your network is hacked. Or it's the bored teenager next door...
I recommend to replace the WEP only device instead of taking the risk of a hacked network.
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E4200 multiple unknown MAC's in filter list

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