---
sourceDocument: Brazil Operational Technology Management
sourceDocumentLink: https://www.servicenow.com/docs/r/operational-technology

 Release :

    - brazil

ft:locale :

    - en-US

ft:publication_title :

    - Brazil Operational Technology Management

ft:clusterId :

    - optm

bundleId :

    - optm

workflow :

    - Technology


---

# Enhanced Access Control

# Enhanced Access Control for Operational Technology {#ariaid-title1}

Release version: Brazil  
Updated September 10, 2026  
![](https://www.servicenow.com/docs/portal-asset/ico-clock) 2 minutes to read  
Enhanced Access Control for OT implements data filters, deny unless access control rules (ACLs), and ACL
query rules to help promote system security. Granular access control extends these protections to the Equipment Model Entity (EME) level, so you can restrict access from the site level to individual plants, lines, areas, and other ISA 95
hierarchy nodes.

## Enhanced Access Control overview {#ot-enhanced-access-control__section_lhc_b5s_dgc}

Enhanced Access Control provides the following components to provide access control configurations for your data to help avoid misconfiguration and security issues.

Data filers
:   Ability to control access at the query level.

Deny Unless ACLs
:   Ability to deny access to data unless the specific conditions are met.

ACL Query Rules
:   Exact query and range query ACL operations to control query privileges.

## Enhanced Access Control for OT {#ot-enhanced-access-control__section_zjc_w5s_dgc}

Deny Unless ACLs help enforce IT and OT separation and site-based access.  
IT and OT separation  
Non-OT users can't view OT devices in Configuration Management Database (CMDB) tables. If a device is classified as an OT CI, only users assigned the cmdb_ot_viewer role, or the cmdb_ot_editor role can access it. The following table describes each role.{#ot-enhanced-access-control__table_lgz_3w2_fgc__entry__2}

| Role | Description |
|-|-|
| OT Viewer \[cmdb_ot_viewer\] | Read-only access to OT device records. |
| OT Editor \[cmdb_ot_editor\] | Create, read, update, and delete access for [Operation Technology (OT) extension classes](https://www.servicenow.com/docs/access?context=cmdb-ci-class-models-operation-technology&version=brazil&pubname=brazil-servicenow-platform&ft:locale=en-US). Note: Users assigned the cmdb_ot_editor role can edit and delete only OT configuration items (CIs) and can't edit IT CIs. |
[Table 1. OT roles to view OT CIs]

{#ot-enhanced-access-control__table_lgz_3w2_fgc}  
There are also restrictions on OT users who can edit or delete IT configuration items (CIs). Users assigned the cmdb_ot_editor role, or the cmdb_ot_admin role can't edit or delete IT CIs in the following related lists:

* IP Address
* Network Adapter
* Storage Device
* File System
* Memory Module
* Patch = CI Field
* Package = CI Field
* Managed Network
{#ot-enhanced-access-control__ul_ed2_ncf_fgc}  
Site-based access

Site-based access specifies which users can view, edit, and delete OT devices for a designated site. You can assign site-based access to users by using Can Read or Can Edit user
criteria. For more information about assigned Can Read access, see [Assign user criteria for Can Read access to a site](https://www.servicenow.com/docs/cF~XONw~cvuhuqsTMI7heg "Assign the user criteria to a site to define which users can read or view the equipment model entities that belong to the selected site."). For more information about assigning Can Edit access, see [Assign user criteria for Can Edit access to a site](https://www.servicenow.com/docs/DfRTlTUybZsDeftbjtltFA "Assign the user criteria to a site to define which users can edit the equipment model entities that belong to the selected site.").  
The following table describes the site-based access for users assigned the cmdb_ot_viewer role or the cmdb_ot_editor role. {#ot-enhanced-access-control__table_td2_jy2_fgc__entry__2}

| Role | Site-based permission |
|-|-|
| cmdb_ot_viewer | With Can Read access, users assigned the cmdb_ot_viewer role can only view OT devices for a designated site. For example, if you're assigned the cmdb_ot_viewer role and have Can Read access to the Atlanta site, then you can only view the site's OT devices. You can't edit or delete the OT devices associated with Atlanta. |
| cmdb_ot_editor | To edit OT devices, users with the cmdb_ot_editor role should be assigned Can Edit access for the site, or sites they belong to. For example, if you're assigned the cmdb_ot_editor role but only have Can Read access to the Atlanta site, you can only view the devices associated with Atlanta. If you're assigned the cmdb_ot_editor role and have Can Edit access to the San Diego site, you can edit or delete the devices associated with San Diego. |
[Table 2. Site-based access for OT roles]

{#ot-enhanced-access-control__table_td2_jy2_fgc} Important:  
New records can't be created directly on the `isa_entity_user_criteria_access` table through the UI or any insert path. Existing records on this table remain readable and can be updated per the applicable ACL.