Hi,
One of the things we have found is that the biggest obstacle to accurate
scanning can be the other security products on the network. If you have host
IPS or network IPS they can both block the scanning activity and so you end up
with only the mac address to do classification with. The IPS is doing its job
when it blocks the scanning traffic so the best thing to do is to white-list
the IP address that RogueScanner is running from with the IPS.
The latest (2.2) release of RogueScanner includes DHCP based fingerprinting
which adds a lot of accuracy. You need to be patient though since it can take
24 hours or more to see DHCP traffic.
BTW, I am going to be at Shmoocon later this week and we will be showing off
network scanning as part of the Shmoocon labs if anyone wants to drop by and
see it in action.
Regards,
Chris Waters
CTO, PhD
Network Chemistry, Inc
cwaters@networkchemistry.com
-----Original Message-----
From: Hari Sekhon [mailto:hpsekhon@googlemail.com]
Sent: Wednesday, March 21, 2007 12:02 PM
To: Waters, Chris; focus-ids@securityfocus.com
Subject: Re: Wired detection of rogue access points
I tried it out, and I understand what you are trying to do but my
results where a fair way off, some were spot on, but a lot of others
weren't. I know it's not an easy job to fingerprint in this way.
Couldn't you leverage some Nmap work, since they have good and reliable
fingerprints.
Also, there were so many wifi-suspect that I either would spend ages
investigating everything or not at all (possibly the latter)
-h
Hari Sekhon
Chris Waters wrote:
Hi,
Every network device has some fingerprint in the way that it interacts
with the network. This includes things like the open ports, the
responses to probes on those ports, the operating system it is
running, the broadcast protocols is uses (DHCP, UPnP, CDP, IAPP, etc),
its MAC address, etc.
This fingerprint information can be used to uniquely identify
virtually every type of network device, assuming of course that you
have a database of the fingerprints for all the devices that might
exist on the network.
This is exactly how RogueScanner (roguescanner.networkchemistry.net)
works. It probes devices to determine their fingerprints as well as
looking at the packets that they broadcast onto the network. By using
lots of techniques together it is possible to accurately find and
classify all sorts of devices, including wifi routers which may using
firewalling and MAC address cloning to hide themselves.
Regards,
Chris Waters
CTO, PhD
Network Chemistry, Inc
cwaters@networkchemistry.com
On Mon, 2007-03-19 at 10:20 +0000, johnnywkm@gmail.com wrote:
Hello there,
Can anyone point me to a wired LAN scanner/sniffer that detects
wireless access points connected to the LAN?
Doesn't look possible to me. You can detect wireless stuff but not
from cable side. There is a endless ways to hide it but you cannot
hide radio waves so easily.
Tõnu
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