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Next: 4.16 What about `SMB Up: 4 Rules and Alerts Previous: 4.14 Why do certain

4.15 Can priorities be assigned to alerts using ACID?

The quick answer to this question is no. ACID is at the mercy of the underlying database, since Snort doesn't assign priorities, ACID does not have priorities. Nevertheless, there are several work-arounds:

  • It is possible to enforce priorities of sort at the database level by writing alerts of different severity to separate databases. For example, critical alerts such as buffer overflows can be written to one database, while scan alerts can be written to another. Then load two different versions of ACID, each pointing to a different instance of the database.

  • With manual intervention Alert Groups (AG) can be used to assign priority. Essentially, this strategy entails creating an AG for each severity level and manually moving the alerts as they arrive into the appropriate group.


Nigel Houghton 2006-10-02
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