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Alienvault OSSIM: What does “reliability” actually mean?

I know the "risk" calculation, but I don't understand what the variables in the calculation mean The risk calculation is ((asset * priority * reliability)/25) I don't quite understand what the ...
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1answer
142 views

Logstash output to AlienVault (OSSIM)

I have the following topology: rsyslog clients -> logstash server -> elasticsearch & another logstash & alienvault & local file The problem is that alienvault wants just the raw message, ...
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1answer
38 views

How to filter errors 404 to show only those which are related to php files?

One of my web servers is getting flooded with requests to resources that do not exist anymore, generating the corresponding 404 error. As I'm using OSSEC and OSSIM, then these errors are sent to the ...
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1answer
1k views

How to send NAGIOS alerts to OSSIM server

I've installed an OSSIM server and I wanto to retrieve the alerts generated by a remote Nagios server in order to analyze them and perform correlation of security events. Before putting hands on it, ...
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1answer
742 views

OSSIM Alarms for Snort rules

I'm new to OSSIM. My requirement is to detect executable files (.exe) using snort. I have found a snort rule: alert tcp any any -> any any (msg: "DLL Windows file download"; flow: established; ...
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3answers
8k views

How to configure sensor rules in OSSIM

we've recently moved our NIDS installation from StrataGuard to the new OSSIM 2.1 release to take advantage of the additional features (Nagios, ntop, Nessus/OpenVas, etc.) it provides in addition to ...
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2answers
2k views

OSSIM - Snort/OSSEC/Nagios Logging Config Question

Quick n00b OSSIM question. I've looked around but haven't found exactly what I'm looking for. I currently have a Nagios, OSSEC, Nessus, and Snort server and I want to keep those servers active but ...
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1answer
604 views

OSSIM In Production Environment

I am trying to get some real-world feedback on OSSIM. Are you using OSSIM in production? If so, what has your overall experiance been? How many nodes are in your enviroment? Finally, what kind ...