Rules

AME Rules provide a way to apply attribute updates during the creation of an event or when appending a new alert to an event.

To understand when and how the AME Rule Engines applies rules, see

Event Automation for more details.

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See Role Overview for capabilities required to manage rules.

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Some features require an active subscription. See Features for details.

Managing Rules

The following image shows the rules UI:

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Only if a user is in the tenant's user list will this tenant be shown as an option to create a rule.

The search field can be used to filter by rule name.

Use the following buttons to manage rules:

Button	Function
	Add Rule
	Clone Rule
	Save Rule
	Delete Rule
	Add Condition / Updates / Keyword / Rule Notification Trigger
	Delete Condition / Updates / Keyword / Rule Notification Trigger
	Change Condition Boolean
	Add Nested Condition

Set up a rule

To create a rule that will apply to all events managed by Alert Manager Enterprise:

1. Click the Add Rule button at the top of the list. A modal window will open.
2. Give the rule a unique name.
3. Select a time range in which the rule should affect the events.
4. Adjust the Scheduled Rule (Subscription required)
5. Add a Condition by using the Add Condition Button
6. Add Rule Notification Triggers by using the Add Rule Notification Trigger Button (Subscription required).

How to create a Rule Condition

For a rule to be triggered, at least one condition has to be defined.

1. Click the Add Condition button
2. A row that consists of a field, a condition, and a value gets added. The Field-Input takes any field present in the event and also metadata about the event. See AME Event Automation for a complete field list.

The condition dropdown has the following comparators:

Comparator	Type	Example	Notes
equals	String	success, fail*	Supports Wildcards
not equal	String	success	Supports Wildcards
less than	Integer	4
greather than or equal	Integer	5
less than or equal	Integer	3
CIDR matching	IP Address in CIDR Notation	10.10.10.0/24
in	Stringlist	apple banana cherry
contains	String	apple	The comparison field must be a list

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The free version of AME only supports one condition

Advanced Rule Conditions

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This feature requires an AME subscription.

Using boolean operators it is possible to create more complex rules. Let's assume we have two searches, one is looking for root logins on unix systems, whereas the other search looks for Administrator logins on Windows hosts. We only want the rule to apply when hosts in two different networks are affected.

In pseudo-code, this would look like this:

(ame.savedsearch_name == 'bruteforce_unix_root' AND dest_ip="10.10.10.0/24") 
OR 
(ame.savedsearch_name == 'bruteforce_windows_administrator' AND dest_ip="10.10.11.0/24")

Using the Add nested condition button and adding conditions with the Add condition button, the result would look like this:

Updates

When a rule gets triggered, one or more attributes of an event can be updated.

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A subscription is required to update more than one attribute at a time.

Attibute	Notes
Status	The selected status to be a valid next status
Urgency
Impact
Notifications
Resolution
Event TTL
TTL Target
Tags	Selected tags will be added to existing tags

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All updates will be ignored if an attribute update is invalid. A Splunk message will be displayed, and an event will be logged.

Rule Notification Triggers

Rule Notification Triggers are used for triggering notifications when a rule has been triggered.

A Rule Notification Trigger consists of one (or multiple) Keyword, which can be used as a filter a Notification Scheme, and a message. The message text can be used in a notification.

See more about notifications here

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A subscription is required to use Rule Notification Triggers.

Cron Syntax

The cron syntax is used to match events on an interval basis and follows standard cron format without the command to execute.

The cron string matches the alert time, and then the expression evaluates to either true or false.

# ┌───────────── minute (0 - 59)
# │ ┌───────────── hour (0 - 23)
# │ │ ┌───────────── day of the month (1 - 31)
# │ │ │ ┌───────────── month (1 - 12)
# │ │ │ │ ┌───────────── day of the week (0 - 6) (Sunday to Saturday)
# │ │ │ │ │
# │ │ │ │ │
# │ │ │ │ │
# * * * * *

Examples

# Match on Weekends: 
* * * * 0,6

# Match on Mondays between 01 and 05:
* 1-5 * * 1

# Match on Tuesdays and Wednesdays between 12-13 and 19-20: 
0-59 12,19 * * 2,4

Update, clone, and delete rules and configuration items

Revise the information and press the Save button to update a rule or configuration item. Where available, use the Clone button. To delete a rule or items, press the Delete button.