LINKSYS Router Mac Filter

LINKSYS Router Mac Filter

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LINKSYS Router Mac Filter publicjq.8230.cst 03-24-2008
Posted by on March 24, 2008, 8:44 am
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Currently I have a system that cannot handle wireless encryption. I'm
running it now without any security except I do not broadcast the
SSID. Will MAC filtering buy me any additional security or is it just
a waste of time?

John Q Public

Posted by Sebastian G. on March 24, 2008, 9:42 am
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publicjq.8230.cst@live.ca wrote:

> Currently I have a system that cannot handle wireless encryption. I'm
> running it now without any security except I do not broadcast the
> SSID.


Not broadcasting the SSID is no sceurity feature.

> Will MAC filtering buy me any additional security


No, unless you never use the wireless connection.

> or is it just a waste of time?

Considering that you're abusing a .NET infected MSIE 7.0 as a webbrowser,
any security is certainly wasteful.

Posted by Todd H. on March 24, 2008, 9:47 am
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publicjq.8230.cst@live.ca writes:

> Currently I have a system that cannot handle wireless encryption.

???? Please name the system. I challenge the assertion.

> I'm running it now without any security except I do not broadcast
> the SSID. Will MAC filtering buy me any additional security or is it
> just a waste of time?

It raises the bar for the amount of work someone interest in your
network will have to do, but for someone at all determined it is a
waste of time. Valid mac addresses can be seen over teh air along
with the SSID, so all the attacker needs to do is spoof a valid mac
and set the bssid and off they go. Freely available tools allow
it.

It's just a smidge more work than seeing the bssid in a list and
setting your card to it but maybe one more command and that's all.

--
Todd H.
http://www.toddh.net/

Posted by Sebastian G. on March 24, 2008, 10:46 am
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Todd H. wrote:

> publicjq.8230.cst@live.ca writes:
>
>> Currently I have a system that cannot handle wireless encryption.
>
> ???? Please name the system. I challenge the assertion.


I give you an immediate counter example: AMD PCNet 3127 PCMCIA card, based
on Aetheros 1 chipset. The official driver only supports WEP, third party
drivers don't work, and neither does WPA Supplicant.

> It raises the bar for the amount of work someone interest in your
> network will have to do, but for someone at all determined it is a
> waste of time. Valid mac addresses can be seen over teh air along
> with the SSID, so all the attacker needs to do is spoof a valid mac
> and set the bssid and off they go.


Nitpick: With proper encryption, the SSID is encrypted along with the
payload. However, it doesn't matter, since you have to break the encryption
anyway.

Posted by Victek on March 24, 2008, 11:44 am
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> Currently I have a system that cannot handle wireless encryption. I'm
> running it now without any security except I do not broadcast the
> SSID. Will MAC filtering buy me any additional security or is it just
> a waste of time?
>
> John Q Public

Yes, it will discourage casual users who might otherwise piggy-back on your
connection, but why can't you enable encryption?


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