Snort is an open source network intrusion detection and prevention system (NIDS/NIPS).

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Security Onion:snorby alerts shows all local nerwork source IP(public and private)

I have just installed Security Onion distro based on ubuntu. This distro does a great job of combining multiple tools like snort/suricata,sguil,snorby,elsa,bro ids,squert. In my Security Onion ...
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Snort Parallelization Techniques and its effect on DDOS detection capability

I want to ask a query about snort parallelization. 1) Can snort detection rate remains same for all attacks after parallelisation? 2) As the parallelisation of netowrk traffic in each core is based ...
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I want to filter Snort rules by date written

I would like the ability to look at Snort rules that were written in specific date ranges only given a collection of .rules files from either Sourcefire or Emerging Threats. Is this possible?
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Snort sfportscan does not log in unified2 file format

I'm running Snort version 2.9.6.0 and I'm not able to log events from the sfportscan preprocessor using the unified2 file format. This is the conf (actually is the default one): preprocessor ...
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Snort not showing dropped/blocked packets

This question is about SNORT- I m basically trying to detect PING FLOOD attack. I have included the rule**(drop icmp any any -> any any (itype:8; threshold, track by_src, count 20, ...
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Barnyard2 Can't pull xref from unified2 format

I have snort configured to log unified2 in my snort.conf file and am using barnyard2 to parse the unified2 results. It works, except I can seem to figure out to pull the event reference (xref) out of ...
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snort per packet content whitelisting how?

What would a snort content whitelisting rule look like? I want to allow a packet as long as its content contains only a certain approved text string and nothing else. Another orthogonal question: ...