Re: uses of multiple sensors

["sunzi" <sunzi () mod-x co uk>]

Bishan,

I use multiple sensors to break up my rulesets according to the systems(s)
there protecting. I've been known to create a single node for
network-centric attacks, and others for rules directly affecting various
operating systems in the LAN.

Also, on the actual systems that I run snort (some are physically located on
critical servers) I use it to drasticly lighten the load of the sensor in
question. For example, on Web servers, I am known to run multiple instances
of snort, a primary that is only concerned about port 80, one that looks at
everythign else according to O/S, and one that I have ready to go to sniff
100% of traffic from a subnet on that machine. I also have a tendancy to use
a highly restricted ruleset and couple it with BlackIce for my Win32 Servers
to provide auto-blockage for a limited ruleset of y choosing.

It may seem kinda drastic, or even crazy, but it's flexible, and still light
on memory when tweaked well. I've been able to easily run upwards of 10
snort nodes on a production Web server that was getting well over 200
concurrant users, and has been known to get 500+.

hth,
sunzi

----- Original Message -----
From: "Always Bishan" <bishan4u () yahoo co uk>
To: <snort-users () lists sourceforge net>
Sent: Thursday, March 20, 2003 6:30 AM
Subject: [Snort-users] uses of multiple sensors


> hi snorters,
>
> i have 2 snort sensors in my network.
>
> one use that i can make out of having multiple sensors
> is for load balancing, that is , i can put it to watch
> small networks and thus reduce the load on every
> instance.
>
> i think it would be quite beneficial for all of us, if
> some snort greats present here can enlighten us more
> on *uses of having multiple sensors*
>
> this will definitely help all a lot of us, now and in
> future.
>
> Thanx in advance.
>
> Bishan
>
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