On Mon, 28 Jul 2008 11:15:05 -0500, msg <msg@_cybertheque.org_> wrote:
>I would also suggest offering MAC-based auth. for certain customers
>who use older handhelds that aren't friendly to browser-based
>authentication schemes; the shop manager can manually manage such
>customer access from an admin interface. WiFi access admin at one
>local university does just that for such devices and for wireless
>printers, etc.
>
>Michael
Shop manager? She's qualified to run a coffee shop, but is clueless
as far as wireless and computers are concerned. It's like that at
most of my coffee shop customers. The few that do have a computer
literate person on the staff, don't want that person wasting their
time tweaking the system, or dealing with customer issues.
Unfortunately, what happens is that the customer gets told to talk to
the admin (that's me). I get a call on my cell phone asking how to
deal with a connection problem. I have yet to see any manner of
"older handheld" issues.
As for MAC authentication, I have to expire the MAC address table at
least once per hour at shops frequented by the local software
developers and students. There's some kind of "privacy" scheme that
rotates phony MAC addresses when the laptop is idle. The result is
that MAC address table rapidly fills up, kicks off legitimate users,
and ruins my day.
The hackers running some kind of virtual machine are also a thrill.
Some of these VM's apparently also virtualizes the MAC address and
replace it with a phony address. I've seen one laptop grab about 8
MAC addresses, one for each VM on the laptop.
The surest sign of success is abuse and pollution. MAC addresses are
certainly successful.
There's only one kind of authentication that I really trust. X.509
certificates issued by a known certificate authority. I use those on
USB dongles at medical offices for HIPAA security. Works well, except
when someone forgets their dongle. However, that's overkill for a
coffee shop.
Now, I have a coffee shop question. Duz anyone have an easy way to
log off users after 60 minutes and prevent them from faking a MAC
address and logging back in? Note that I said "easy" which means I
don't want to setup a NAC security infrastructure or similar
monstrosity.
--
Jeff Liebermann
jeffl@cruzio.com
150 Felker St #D
http://www.LearnByDestroying.com
Santa Cruz CA 95060
http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558