Snort mailing list archives
Re: Get reliable SnortSP drop statistics
From: Russ Combs <rcombs () sourcefire com>
Date: Wed, 13 May 2009 12:05:16 -0400
On both issues, that is how SnortSP works at present ... The drop count is maintained on the engine side and doesn't get reported by the Snort analytic, which always reports zero. Depending on how SnortSP is configured, eg with multiple load-balanced Snort analytics, it really doesn't make sense for the analytics to output drop counts. That may be removed in the future but was left in for overall compatibility. Also, when using the tool to control SnortSP via socket, the responses are not yet routed back over the socket, but instead go to syslog or whatever as configured. That is work still to be done. Thanks for pointing these issues out. I'll try to get those into the README before the next release. Russ On Wed, May 13, 2009 at 8:52 AM, Loïc Etienne <loic.etienne () cern ch> wrote:
Hello guys, I'm currently running snortsp beta 3 on a link with very high traffic (500-600mbits/s) and I have noticed something strange concerning the packet drop statistics. We currently run the perfmonitor preprocessor with the following config: preprocessor perfmonitor: time 600 file /opt/snort/log/current/snort.stats pktcnt 100000 When looking at its output, it always report 0.000 packet drop ratio Examples: 1242216008,0.000,598.942,0.005,87.934,853,68.964,556.730,526.659,906.033,295.431,3173088,3173088,144.991,0,250175,0.000,0.000,0.000,0.000,0.000,0.000,0,0,0,0,8,0.000,0.000,100.000,15.421,10.819,73.760,99.455,0.298,0.247,14.802,10.048,75.150,0.020,0.000,99.977,14.971,10.249,74.779,0.118,0.103,99.778,13.328,9.072,77.600,598.942,0.000,0.000,1.664,600.606,852,0,0,1434,853,87.790,0.000,0.000,0.145,87.934,52739772,0,0,0.000,0.000,0,0,3173088,715758,943715,1514173,233.324,87.807,416.650,0.000,0.000,0,0,0.000,0,0.000, (...) 1242218389,0.000,530.755,0.000,77.491,858,74.349,505.810,483.263,928.088,177.573,450360,450360,106.160,0,153813,0.000,0.000,0.000,0.000,0.000,0.000,0,0,0,0,8,0.852,0.948,98.200,14.748,18.953,66.300,2.367,2.657,94.976,16.991,21.658,61.351,8.667,10.020,81.313,0.248,0.321,99.432,0.607,0.672,98.721,99.688,0.181,0.131,530.755,0.000,0.000,1.223,531.977,857,0,0,1439,858,77.385,0.000,0.000,0.106,77.491,46453551,0,0,0.000,0.000,0,0,450360,130207,169289,150880,283.355,50.508,256.326,0.000,0.000,0,0,0.000,0,0.000, However, when I query directly the snortsp engine with eng.stats("e1") in the LUA shell for example, I get the following: [*] ACTIVE data source s1 received 153960354 packets on eth2 Analyzed: 70274715 (45.645%) Dropped: 83685639 (54.355%) Idle Cycles: 70274660 [-] Ethernet Stats: Count: 70304420 (...) Do you see any reason why these two methods would report different numbers? Is the preprocessor printing another drop ratio than the engine? Also, we have another snort instance running on a production server (deamon mode), and we would like to check the output of the eng.stats() command. According to the documentation, it is possible to use the snortsp_tool to interface directly with snortsp through a kernel socket. It works fine to issue commands to snort, but we are unable to redirect it's output back to us. There is not much documentation on snortsp_tool out there, so maybe there is an easy way to do that? Thanks in advance for your expertise ! Cheers, Loïc Etienne ------------------------------------------------------------------------------ The NEW KODAK i700 Series Scanners deliver under ANY circumstances! Your production scanning environment may not be a perfect world - but thanks to Kodak, there's a perfect scanner to get the job done! With the NEW KODAK i700 Series Scanner you'll get full speed at 300 dpi even with all image processing features enabled. http://p.sf.net/sfu/kodak-com _______________________________________________ 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<https://lists.sourceforge.net/lists/listinfo/snort-users%0ASnort-users>list archive: http://www.geocrawler.com/redir-sf.php3?list=snort-users
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Current thread:
- Get reliable SnortSP drop statistics Loïc Etienne (May 13)
- Re: Get reliable SnortSP drop statistics Russ Combs (May 13)