Create ACL Rules

tip

Role required: security_admin.

Elevate your access right by this role to create or perform any other operations with ACL rules.

The ACL rules allow you to secure access to the objects and operations, depending on your business processes.

For example, you can restrict changing states of a task to the users who are not involved in the process (editing is available only to the assignee). In the Use cases section of this article, consider the following case: you need to hide specific information about the employees, so that the confidential information and information about their roles is protected in the system.

note

The ACL check is performed using three fields combined:

• Roles
• Condition
• Script

If the Roles field of the ACL rule is empty, the next step is the condition check, if any specific condition is specified. If the Condition field is empty, then the Script field checks for the specific conditions and attributes.

If any of these steps fail, the ACL check fails, too. That is, the ACL does not check the next steps if the previous fails.

The scheme below represents the ACL check process:

To create an ACL rule, complete the following steps:

1. Navigate to the System Security → Access Control (ACL).
2. Click New and fill in the fields.
3. Click Save or Save and exit to apply the changes.

Access Control form fields

Field	Mandatory	Description
Name	Y	This field is read-only and is populated automatically by the system after saving the record. The word in the square brackets indicates the operation. The name after the first period indicates the secured table and the column (if there is one specified in the Column field) after another period: [Delete].sys_history [Read].sys_history.created_by. This field supports the asterisk (*) wildcard character in place of a record, table, or field name, which allows you to select all objects matching a record type, all tables, or all fields.
Operation	Y	Select an operation to secure. Available options: create read write delete One ACL rule can secure only one operation. To secure more than one operation, create a separate ACL rule for each of them.
Any tables	N	Select this checkbox to secure all tables in the system. When selected, the Table field is hidden until the checkbox is cleared.
Table	Y	Specify a table to secure. One ACL rule can secure only one table. To secure several tables, create a separate ACL rule for each of them.
Description	N	Add a description of the object or permissions this ACL rule secures.
Roles	N	Specify the roles required to pass the ACL check. After a role is specified, users without this role do not pass the check. You can select more than one role.
Active	N	Select this checkbox to activate the ACL rule.
Admin overrides	N	Select this checkbox to allow system administrators (users with the admin role) to pass the ACL rule automatically. Admin users access the object or operation regardless of the existing restrictions. Clear this checkbox to check these users by the rule. Define the filters in the condition builder or in the Script field to create conditions that admin users should meet to get access.
Any fields	N	Select this checkbox to secure all columns in the table. The Column field is hidden until the checkbox is cleared.
Column	N	Select a column to secure. One ACL rule can secure only one column. If you need to secure more than one column, create a separate ACL rule for each of them.
Conditions	N	Use the condition builder to create filters.
Script	N	Enter a script that defines the conditions to meet. The result of the script execution is the answer variable equal to true or false.

note

If you pass any non-Boolean value to the answer variable, it is implicitly converted to the Boolean type.

Example

answer = current.sys_id;
// if the record already exists - true, if there is no record yet (null) - false

Use cases

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Case 1

The company should hide the following information about its employees:

• Mobile Phone
• User Roles

Only the users with the user_manager and admin roles and the employees themselves should have access rights to this information. An employee cannot see the mobile phone and roles of other employees.

To do so, you need to set up two ACL rules:

ACL №1 allows access to the Mobile phone field to the record owner:

Field	Value
Operation	read
Admin overrides	true
Table	Employee
Column	Mobile phone
Condition	ID is javascript: return ss.getUserID();

The ACL rule is created: [Read].employee.mobile_phone.

ACL №2 allows access to the Mobile Phone field to user managers:

Field	Value
Operation	read
Admin overrides	true
Table	Employee
Column	Mobile phone
Condition	user_manager

The ACL rule is created: [Read].employee.mobile_phone.

The result is the following:

These two screenshots illustrate the Employee list with ACLs №1 and №2.

The list of records shown to the owner of the employee record without the user_manager role (Stepan Petrov):

The list of records shown to a user with the user_manager role:

Case 2

You need to allow access only to one field in the Request (itsm_request) table, but creating an ACL for each field you need to protect to is time-consuming.

For these purposes, you need to create two ACLs:

• [Write].itsm_request.discussion – gives access to edit the Discussion field.
• [Write].itsm_request.* – restricts access to all fields to users without the ITSM agent role. The restriction works for each field for which there are no allowing ACL rules.

Since this ACL rule does not specify roles and conditions, it is the allowing ACL rule.

[Write].itsm_request.discussion

Field	Value
Operation	write
Admin overrides	true
Table	Request
Any fields	false
Columns	Discussion

This rule allows the users with ITSM_agent role to edit all fields in the Requests table. Users without this role have no access to edit all fields of the Requests table.

[Write].itsm_request.*

Field	Value
Operation	write
Admin overrides	true
Table	Request
Any fields	true
Roles	ITSM_agent

These ACL rules ensure that the caller (or any other user who is not an agent) cannot edit the record fields. Only users with ITSM_agent and admin roles can do that. At the same time, the caller can leave comments to communicate with the assigned user or group.

In other words, the ACL rule marked with the asterisk (*) works for each field, except those which have their own ACL rules.