Re: Wireless Disconnects

On Wed, 19 Nov 2008 21:52:16 +0000, Mark McIntyre
<markmcintyre@xxxxxxxxxxxxxxxxxxx> wrote:

Jeff Liebermann wrote:
On Tue, 18 Nov 2008 22:50:39 +0000, Mark McIntyre
<markmcintyre@xxxxxxxxxxxxxxxxxxx> wrote:

Business name - ok. Business address - matter of public record.
Private address? Can't agree.

Well, ok. We can fine tune the level of privacy later. My attitude
is that the only thing of importance is the WPA/WPA2 encryption pass
phrase.

We could argue about this all month. Playing devil's advocate:

I'll play the devils side kick:
<http://802.11junk.com/jeffl/pics/jeffl/slides/jeffl-wolf.html>

If I came across a router with a really good passphrase it would
indicate a tech-savvy owner. That in turn would indicate potential for
high-value computer kit. Which in turn indicates a good target for a
burglary. Now the address comes in handy.

Or say you're a stalker and you know your prey is in that apartment
building. Snoop their wireless SSID, now you know they're in appt 5.

In both cases you got the info without any digging into their trash,
network or mail. In fact, since they deliberately broadcast their
address, you haven't even committed any crime.

Sorry, but I don't buy the reverse psychology theory. Sometimes it
works, usually it doesn't. In order to 2nd guess a criminal, you have
to actually be a criminal. I don't think either of us qualify. As I
understand it, criminals prefer easy targets. If things get
complicated, they blunder onward and find an easier target. Car
thieves are a good example.

Incidentally, there's an RFC for having the access point deliver its
location via DHCP:
<http://www.faqs.org/rfcs/rfc3825.html>

Have you /ever/ found a retail AP that let you do that? I haven't. I
once owned a (wired) router that let you configure the SNMP responses
but it forgot them after every powerdown. Excellent design.

RFC3825 was originally inspired by Cicso. To the best of my
knowledge, it hasn't appeared in any of their products. The orignal
inspiration was to avoid using RFC1712
<http://www.faqs.org/rfcs/rfc1712.html>
which uses DNS for the same functions and requires far too much
adminstrative overhead. I once asked several dynamic DNS providers if
they were willing to handle transcient geopositioning data in their
DNS records. After the initial confusion, the answer was something
like "no way in hell".

Using geographic DHCP extensions is also a good way to do lots of
things (such as geographic routing for mesh networks). I was working
on a prototype that used a similar protocol, but the dot.com funding
it went bust. The big problem was that the client required a custom
DHCP client in order to use the data.


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

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