Re: [Q] thresholding: to throttle flood of alerts

["Victor Klimov" <vk77de () googlemail com>]

Hi Leon,

Yeah, I know, it should work...
But it doesn't:

#Rule for alerting common TCP/UDP flood attack:
alert ip any any -> any 5060 (msg:"COMMUNITY SIP TCP/IP message
flooding directed to SIP proxy"; threshold: type limit, track by_src,
count 1, seconds600; classtype:attempted-dos; sid:100000160; rev:2;)

This rule above should limit the flooding alert: once in 10 min.
However I continue to see a lot of 100000160 alerts, several per minute.
Hmm...

Victor

On Wed, Oct 15, 2008 at 9:24 PM, Leon Ward <seclists () rm-rf co uk> wrote:
> Hi.
>
> You are looking for "limit", or rather "both" limit and threshold
>
> Take a look at README.thresholding in the /doc directory and the link below.
>
> http://snort.org/docs/snort_htmanuals/htmanual_280/node330.html#Event_Thresholding
>
> -Leon
>
>
>
> On 15 Oct 2008, at 19:50, Victor Klimov wrote:
>
> > Hi Jack,
> >
> > Actually I don't want do detect a flood. I already have some kind of
> > flood,
> > at least according to what I get from snort.
> > I want to throttle the flood of 'flooding directed to SIP proxy' messages.
> >
> > Even if changed the threshold values in the original rule,
> > I do see several in let's say 3 min.
> >
> > That is what I want to throttle.
> >
> > Victor
> >
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