[Snort-users] Fine tuning Snort

James Lay jlay at ...13475...
Fri Oct 8 08:47:43 EDT 2010


What the....I looked all through the snort pdf too and since I didn't see an
example showing that I uh...well assumed.....heh..you've saved me a BUNCH of
time..thanks Scott.

Jam

From:  ScottO <skippylou at ...11827...>
Date:  Fri, 8 Oct 2010 08:31:57 -0400
To:  James Lay <jlay at ...13475...>
Cc:  Snort <snort-users at lists.sourceforge.net>
Subject:  Re: [Snort-users] Fine tuning Snort

James,

You can specify cidr notation for address blocks in threshold.conf,
something like:

suppress gen_id 1, sig_id 11111, track by_src, ip 10.1.2.0/24
<http://10.1.2.0/24>

Hope that helps,

scott

On Fri, Oct 8, 2010 at 8:24 AM, James Lay <jlay at ...13475...> wrote:
> Thanks Waldo,
> 
> It's been quite interesting...I have at least four rules that look for
> executables...and as I look at the threshold file I can only threshold
> against one IP at a time...meaning I've got a lot of work to do as I have
> to add pretty much most of google and windowsupdate.com
> <http://windowsupdate.com>  ;)  Even thought
> I'm tempted to simply start snort to not monitor those netblocks, eh...I'd
> rather do the right thing.
> 
> Thanks again for the help.
> 
> James
> 
> 
> On 10/7/10 10:23 PM, "waldo kitty" <wkitty42 at ...14940...> wrote:
> 
>> >On 10/7/2010 14:02, James Lay wrote:
>>> >> Kevin and Waldo, you gents are treasuresŠI will get to work and report
>>> >>my
>>> >> resultsŠthank you much!
>> >
>> >something else to thing about concerning rules that you would just
>> >totally
>> >suppress in threshold.conf... if they are completely suppressed then you
>> >might
>> >as well comment them out of the rules set so they do not consume any
>> >memory and
>> >snort won't waste any time loading them just to be ignoring them... but i
>> >guess
>> >this also depends on your tools and management systems... some may use
>> >only
>> >threshold to "disable" rules where others may actually comment them in
>> >the rules
>> >sets files... personally, i think the threshold file is best to suppress
>> >certain
>> >rules for certain IPs... total suppression is the same as disabled so...
>> >;)
>> >
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> 
> 
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