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From: Paul (paul14075gmail.com)
Date: Sun Sep 28 2008 - 17:02:48 CDT
By default, the 40-bit WEP key for the wireless router provided by
Verizon to FiOS (fiber optic) and possibly DSL customers is set to the
last 40 bits of the router's 48-bit MAC address. This is significant
because the router's MAC address (the MAC address of it's WAN-side
ethernet port) is easily discoverable using kismet without even
needing to know the WEP key.
The MAC will usually be listed by kismet in the list of
connected/associated clients (the 'c' key in kismet). You can tell it
is the router's MAC because it will have the same first 3 octets as
the BSSID (wifi-MAC) but different last 3 octets.
This is true for every Actiontec router I've tested. In each case,
the MAC was listed by kismet in the list of connected clients, and in
every case the WEP key was the last 40 bits of this MAC.
Verizon FIOS (and DSL?) access points are detectable due to their
predictable default ESSID' which is a 5 character string of random
letters and numbers (ie A1BC3 or AB123, etc).