Jacques B. wrote:
On Jan 23, 2008 8:55 PM, Frank Cox <theatre@xxxxxxxxxxx> wrote:
On Thu, 24 Jan 2008 10:24:09 +0900
John Summerfield <debian@xxxxxxxxxxxxxxxxxxxxxx> wrote:
WEP's good for about two minutes these days.
Interesting.
What should you do to protect access to your wireless network?
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Use WPA, MAC filtering (only allow connections from ...), don't
As someone's already noted in this thread, MAC addresses can be forged.
And discovered.
broadcast SSID (and don't use a SSID that provides someone with an
Hiding the SSID is faily useless. Just download and fire up kismet and
you'll see what I mean.
indication of who owns the AP - more for privacy reasons), subnet mask
to minimize the # of possible IPs on your network (use a subnet mask
that will provide you with the required # of IPs only, with a few
spares only if your situation requires it), monitor router logs for
I don't think that's particularly useful. I can find what IP addresses
you're using and self-assign a suitable one. It's not hard do see what
you're using.
unauthorized attempts or successful connections. You could also used
static DHCP if your router supports it, or turn off DHCP and manually
assign IPs to your machines. If your wireless router supports
Does not help.
modifying the signal strength you could do some testing to see if you
can scale back its strength to cut down on the distance from which
someone can connect (recognizing that people can use directional
antennas to improve their reception even with a weaker signal strength
from your part).
Reduced strength can help. It can also make your wireless network work
less well for you.
Shielding can help. Do you really want the signal to cross the road to
the neighbours, or to someone else in the same block of flats?
Ultimately you want to be less of a target than others. The casual
hacker will move on to a lesser challenge. With the exception of your
neighbour who has all the time in the world, for most hackers (using
the term loosely) the rewards would have to outweigh the effort.
Implementing the various layers of security I've suggested should
avoid you from being the low hanging fruit.
Seems to me most networks around where I live are secured; if I wanted
one I'd have to try a little harder.
Bear in mind that if an attack can be automated, you are low-hanging fruit.
There's about 1.2 million hits for this search:
http://www.google.co.uk/search?q=%22how+to%22+secure+wireless+network&ie=UTF-8&oe=UTF-8
Disregard any that recommend WEP. Anything else your router supports is
probably okay.
So is a firewall at each important end that only allows a VPN (say
openvpn on UDP port 1194). People can get an IP address, but they're not
going anywhere (unless your router also manages your Internet connexion).
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Cheers
John
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