On Sat, 12 Jan 2013 06:17:00 -0800, "William Sommerwerck"
wrote:

By the way... It's possible (and quite easy) to set up your local network so
that it will communicate only with devices that you've supplied the MACs for.
This isn't 100%-foolproof, as it's possible for someone to read the MAC when
it's transmitted, then mimic it. But for the average user, it makes your
network effectively inaccessible.

Actually, it's trivial to hack into a wireless router with MAC address
filtering enabled. Just sniff the traffic to/from that wireless
router and collect the MAC addresses that are being used. The MAC
addresses are NOT encrypted. Then, just change the MAC address of
your computer to one of them, and you're on.
http://www.irongeek.com/i.php?page=security/changemac
MAC address filtering might be effective for the clueless user, but
the average user usually knows someone more knowledgable who can help.

For a wireless router, the only real and effective security is WPA2
encryption. All else, including MAC address spoofing, IP filtering,
SSID hiding, and the disgusting guest mode, are only minor additional
obstacles, which can eventually be circumvented with minimal effort.

--
Jeff Liebermann
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558