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Re: Using detection_filter instead of threshold
From: infosec posts <infosec.posts () gmail com>
Date: Wed, 27 Oct 2010 14:55:27 -0500

Are you saying that a new, separate file can be maintained that just
contains the event_filter statements (and then included via
snort.conf), or do I have to put separate event filters in each of my
snort.conf files the way I am now?

I preferred the method of modifying the threshold in the rule, since I
could change it one place and it pushed across all my sensors.  Now,
if I want this functionality, I'm going to multiple snort.conf files
and adding a statement to each.



On Wed, Oct 27, 2010 at 12:15 PM, Joel Esler <jesler () sourcefire com> wrote:
Thanks.

All of that being said, you can still use threshold at this time.  Its just time to start moving those things over to 
the new format. I suggest doing "thresholds" and suppressions in a separate file (not modifying the rule) anyway.


Sent from my iPhone

On Oct 27, 2010, at 1:13 PM, "Eric L. Howard" <ericlhoward () gmail com> wrote:

On Wed, Oct 27, 2010 at 12:47 PM, L0rd Ch0de1m0rt
<l0rdch0de1m0rt () gmail com> wrote:
Thanks.  Is there any way to do it in the rule itself like back in the
salad days?

Nope.

DEPRECATED ITEMS
================

* detection_filter replaces the existing in-rule threshold, which is now
 obsolete.  Furthermore, the existing threshold when used within a rule was
 not part of the detection process; it was equivalent to a standalone
 threshold.  To retain the functionality of existing in-rule thresholds,
 reformat them as standalone event_filters (see below).

* event_filter replaces the existing standalone threshold, which is now
 deprecated.  Furthermore, even though event_filter is an alias for threshold,
 which is allowed to appear in a rule (although that use is now also
 deprecated), event_filter will not be allowed in a rule.  Such use will
 result in a fatal error during initialization.

~elh

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------------------------------------------------------------------------------
Nokia and AT&T present the 2010 Calling All Innovators-North America contest
Create new apps & games for the Nokia N8 for consumers in  U.S. and Canada
$10 million total in prizes - $4M cash, 500 devices, nearly $6M in marketing
Develop with Nokia Qt SDK, Web Runtime, or Java and Publish to Ovi Store 
http://p.sf.net/sfu/nokia-dev2dev
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