Re: Too much of snort events

["Oleg Makarov" <oamakarov () platbox com>]

ipvar HOME_NET 10.0.0.0/8,192.168.0.0/16
ipvar EXTERNAL_NET any
I have in snort.conf this
preprocessor stream5_global: track_tcp yes, \
   track_udp yes, \
   track_icmp no, \
   max_tcp 262144, \
   max_udp 131072, \
   max_active_responses 2, \
   min_response_seconds 5
preprocessor stream5_tcp: log_asymmetric_traffic no, policy windows, \
   detect_anomalies, require_3whs 180, \
   overlap_limit 10, small_segments 3 bytes 150, timeout 180, \
    ports client 21 22 23 25 42 53 79 109 110 111 113 119 135 136 137 
139 143 \
        161 445 513 514 587 593 691 1433 1521 1741 2100 3306 6070 6665 
6666 6667 6668 6669 \
        7000 8181 32770 32771 32772 32773 32774 32775 32776 32777 32778 
32779, \
    ports both 80 81 311 383 443 465 563 591 593 636 901 989 992 993 994 
995 1220 1414 1830 2301 2381 2809 3037 3128 3702 4343 4848 5250 6988 
7907 7000 7001 7144 7145 7510 7802 7777 7779 \
        7801 7900 7901 7902 7903 7904 7905 7906 7908 7909 7910 7911 7912 
7913 7914 7915 7916 \
        7917 7918 7919 7920 8000 8008 8014 8028 8080 8085 8088 8090 8118 
8123 8180 8243 8280 8300 8800 8888 8899 9000 9060 9080 9090 9091 9443 
9999 11371 34443 34444 41080 50002 55555
preprocessor stream5_udp: timeout 180
as I understand I need to comment or delete this, cause in 'var 
PREPROC_RULE_PATH /etc/snort/preproc_rules' I have nothing



------ Исходное сообщение ------
От: "Al Lewis (allewi)" <allewi () cisco com>
Кому: "Oleg Makarov" <oamakarov () platbox com>; 
"snort-users () lists sourceforge net" <snort-users () lists sourceforge net>
Отправлено: 13.05.2016 9:04:47
Тема: RE: [Snort-users] Too much of snort events

> Those are preprocessor events for Stream5 (GID:129). See the 
> preprocessor.rules file. You can disable them there if you like.
>
>
>
> Have you setup your home_net and external_net variables correctly?
>
>
>
>
>
> Albert Lewis
>
> QA SNORT/Sourcefire
>
> SOURCEfire, Inc. now part of Cisco
>
> 9780 Patuxent Woods Drive
> Columbia, MD 21046
>
> Phone: (office) 443.430.7112
>
> Email: allewi () cisco com
>
>
>
> From: Oleg Makarov [mailto:oamakarov () platbox com]
> Sent: Thursday, May 12, 2016 7:26 AM
> To:snort-users () lists sourceforge net
> Subject: [Snort-users] Too much of snort events
>
>
>
> Hi guys!
>
> Please give me an advice, sorry I'm a newbie here.
>
> So I have Snort+Barnyard2+PulledPork+Aanval (as web siem)
>
> It works correctly. I found a lot of alerts with gen_id 129, sig_id 12 
> and gen_id 129, sig_id 4 and suppress them (it's not informative). I 
> found them in Aanval and it's trying to upload whole mysql DB.
>
> But there are still too much alerts  ~ 30events per second and it's 
> nearly 800k events per day.
>
> How can I more understand what are the events generating ?
>
> Thanks.
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