Instructables
Picture of Visual Network Threat Level Indicator
Network monitoring is very important in todays world. The internet is a scary place. People have taken steps to raise their awareness by installing Intrusion Detection Systems(IDS) such as SNORT.

The problem with most of these systems is that upon first installing them they are vigilantly watched. After a week the allure wears off and they are no longer monitored, silently churning away in the depths of the network.

By moving the visualization outside of the computer we make it easier to notice, providing the information at a glance and to a larger audience.

The Visual Threat Level Indicator (VTLI) requires a network connection and power. It does not need to be directly attached to a computer, this way it can be placed anywhere there is network access.

A python script is run on the IDS which connects the the Arduino and updates the display.
 
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Step 1: Parts

Picture of Parts
You will need the following:

-An IDS running SNORT  http://www.snort.org/
-Arduino Uno
-Arduino Ethernet Shield
-Arduino Proto Shield
-10x 470Ω resistors
-10 Segment LED bar graph
-Solder, wires, soldering iron

Step 2: Brief overview

Picture of Brief overview
The VTLI process runs on the IDS and the Arduino.

The Arduino listens for incoming connections to update the display.

The IDS machine has a python script running that will look at the last 24 hours of the snort log to generate the threat level. It connects over the network to the Arduino to update the display. This should run out of cron an interval appropriate to the environment, 5 minutes is a good guess.

Step 3: Program Arduino

Picture of Program Arduino
You need to attach the ethernet shield to the Arduino Uno, take note of the MAC address. Change this in the code attached. Also assign an IP address to the ethernet shield.

alex9901 year ago
Please I need help in step 5

I can see there is 2 small resistors with blue color ... what they are for

i'm stack in this step !! i'm doing my final project in uni

hope you can help me

Thanks
simo90evo2 years ago
Hi guys! I'm trying to setup snort on mac, I've install it, and i tryied to modify the file config.snort, but I don't understand what i I've to do, which line I need to modify to create che log file alert.csv.

can you help me please ?

my email is simo90@me.com

thanx!!!
I would suggest posting/searching the snort website, they will be able to help you much better.
vidtip222 years ago
can anyone please help me with step 5 as i am not able to go through snort
sgleason12 years ago
Could you make an instuctable showing us how to do this with the xbee wifi protoshield. Personally I think that would be more helpful because then it could be placed anywhere within the networks range.
joe (author)  sgleason12 years ago
Hey SGleason1 - I would love to make one of these with an Xbee. It will have to wait until I buy one though!

-Joe
sreeci joe2 years ago
Hello Joe, Thank you for the great project.
Like S.Gleason pointed, if you could assemble one with Xbee, I would be highly interested in it. You may also have a thorough user info along with that.
I am not a great Computer wizzard like you nice guys !!
Kindly respond to my mail if that is possible, please.
Thanks.
Sincerely
KJ Kumar
kjkumarsfo@yahoo.com
joe (author)  sreeci2 years ago
Hey Sreeci and Sgleason - I ordered up an Xbee. So I'll post a new wireless instructable up when I get it in.

-Joe
sgleason1 joe2 years ago
Sweet I can't wait to see it. I don't have an arduino yet or the knowledge of how snort works, but I thought that if you made it with an xbee it would be much easier to put into same sort of frame and keep around the house, or bring it into your living room while watching tv.
joe (author)  sgleason12 years ago
Hey Sreeci and Sgleason - Here is a wireless version of the device:
http://www.instructables.com/id/Visual-Network-Threat-Level-Indicator-v2/

Thanks for looking.

-Joe
megaduty2 years ago
Hmmm,,, gotta get an Ethernet Shield now... Nice write up.
Just out of curiosity, where did you get the LED bar graph?
joe (author)  mr monoply332 years ago
Hey Mr Monoply33 - It is an Avago HDSP4832, You can get it from Jameco here:
http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_1551402_-1

-Joe
Kaylonds2 years ago
Very nice project. But i always wonder why no one ever trys to run the Arduino with Power over Ethernet.
joe (author)  Kaylonds2 years ago
Hey Kaylonds - Thanks!

As far as PoE, for me the reason is simple; I don't have a network switch which can provide PoE. I'm not sure how many home users do either.

-Joe
Kaylonds joe2 years ago
true true.
nubzzz2 years ago
How do you think this would do running with Suricata instead of Snort?
joe (author)  nubzzz2 years ago
Hey Nubuzz- If Suricata has a log, then it would work. If you can give me a sample of 2 lines from the log file, I'll update the python to have a suricata/snort switch.

-Joe
zmashiah2 years ago
Very nice!
I like the use of Arduino showing important information, and Snort by all means is a good thing to monitor (and hopefully not too many false positive generated on your network). On the pictures I see a chip on the proto-shield, is that part of the circuit somehow or there from a something different?
joe (author)  zmashiah2 years ago
Hey Zmashiah- thanks! That chip is a 470Ω resistor network, you don't need it you can use individual resistors. I just had it on hand and find them easy to use.

They can be found at Jameco #108581 http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_108581_-1

-Joe
mister92 years ago
cool stuff