Snort mailing list archives
Re: snort not alerting on same ip ssh attack after restart
From: wkitty42 () windstream net
Date: Fri, 8 Apr 2016 14:53:11 -0400
On 04/08/2016 02:06 PM, John Devine wrote:
Hi all, I am testing alerts on snort 2.9.2.2 on a box running debian by using a mock ssh attack to trigger one of snort's default rules. The rule is generated after 5
i'm not aware of snort having any "default rules"... at least not by that type of naming... which rule are you talking about?
ssh attempts are made within 60 seconds. I am using snort as-is; I have created no custom rules. I can reproduce this about once a day but after a reboot of the box or restart of snort it will not generate an alert after using the same mock ssh attack even when I 'attack' it from a different IP. My guess is that there
what IPs are you testing from? which one works and which does not? what is the IP of your snort box? what are your HOME_NET and EXTERNAL_NET values?
is some default local event filter for a specific rule that prevents the alert from generating again within a certain timeframe. I tried creating a global event filter (event_filter gen_id 0, sig_id 0, type both, track by_src, count -1, seconds 1) in the hope of circumventing all time limits and thresholds that could be preventing snort from alerting. Is there a way to disable any default filters that are preventing snort from generating multiples of the same alerts?
no... not without rewriting the rule... in your case, it would basically mean copying that rule to your local.rules file, modifying it as needed, making sure to change the SID number (very important) and commenting out the original rule in the original .rules file...
If that is even the problem. Essentially, I want snort to be able to generate the same alert every time it happens which is currently does not.
post your answers to the above five questions to the list and let's see what we can do :) -- NOTE: No off-list assistance is given without prior approval. *Please keep mailing list traffic on the list* unless private contact is specifically requested and granted. ------------------------------------------------------------------------------ Find and fix application performance issues faster with Applications Manager Applications Manager provides deep performance insights into multiple tiers of your business applications. It resolves application problems quickly and reduces your MTTR. Get your free trial! http://pubads.g.doubleclick.net/ gampad/clk?id=1444514301&iu=/ca-pub-7940484522588532 _______________________________________________ Snort-users mailing list Snort-users () lists sourceforge net Go to this URL to change user options or unsubscribe: https://lists.sourceforge.net/lists/listinfo/snort-users Snort-users list archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-users Please visit http://blog.snort.org to stay current on all the latest Snort news!
Current thread:
- snort not alerting on same ip ssh attack after restart John Devine (Apr 08)
- Re: snort not alerting on same ip ssh attack after restart wkitty42 (Apr 08)
- <Possible follow-ups>
- Re: snort not alerting on same ip ssh attack after restart John Devine (Apr 08)
- Re: snort not alerting on same ip ssh attack after restart John Devine (Apr 08)
- Re: snort not alerting on same ip ssh attack after restart wkitty42 (Apr 08)