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- Duplicate notices are discovered with the new Notice::Info field $identifier. It's a string that is left up to the notice implementor to define which would indicate a fundamentally duplicate notice. The field is optional and if it's not included it's not possible for notice suppression to take place. - Duplicate notices are suppressed by default for the interval defined by the Notice::default_suppression_interval variable (1 hour by default). - A new notice action was defined ACTION_NO_SUPPRESS to prevent suppression for a specific notice instance. A convenience set named not_suppressed_types was also created to not suppress entire notice types. - A new field was added to the PolicyItem type to modify the length of time a notice should be suppressed if the predicate matches. The field is named $suppress_for. This name makes the code more readable like this: $suppress_for = 1day - New events were created to give visibility into the notice framework's suppression activity. - event Notice::begin_suppression(n: Notice::Info) - event Notice::suppressed(n: Notice::Info) - event Notice::end_suppression(n: Notice::Info) - The suppression.bro script doesn't have a baseline because it is causing a segfault in Bro. This one test is the reason that this is being integrated into a branch instead of master. |
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