[NTLK] Mac Fitering And Encryption

Jeremy O'Brien obrien654j at gmail.com
Thu Mar 22 13:10:58 EDT 2012

On Wed, Jun 15, 2011 at 04:37:55PM +0000, ssgconway at juno.com wrote:
>   My WEP experience has been, as far as I know, good, security-wise.  Visitors who ask to get on-line have to be added to the MAC Address list or they cannot get on.

Both are false. If someone wanted to get on your network, your WEP key
can be cracked within _minutes_, and MAC address whitelisting is useless
if you have at least one authenticated client on your network. The MAC
address that the OS sends when it does its authentication is completely
handled in software, and can be changed very easily. So all an attacker
has to do is clone an authenticated clients' MAC address and boom, he's

If I were parked outside your house and all you had was WEP and MAC
address filtering, I could be on your network in 5 minutes tops.

Not trying to hate, just trying to spread awareness of the _extreme_
insecurity of WEP and the ease of breaking it and MAC address filtering.

If you're actually concerned about your wireless security, at least use
WPA2. Otherwise, you might as well be running an open network.


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