Managing a handful of Wazuh agents is relatively straightforward. However, once your environment grows to hundreds or thousands of endpoints, manually editing each agent’s ossec.conf file quickly becomes impractical.

Keeping configurations synchronized across Windows, Linux, macOS, cloud instances, and remote devices becomes a time-consuming task that increases the risk of inconsistent monitoring and missed security events.

This is where Wazuh Agent Centralized Configuration becomes invaluable. Instead of logging into every endpoint to modify configuration files, administrators can manage agent settings directly from the Wazuh manager.

The manager distributes configuration updates to assigned agents, ensuring they all receive the same approved settings without requiring manual intervention on every system.

Centralized management is especially important for enterprise environments where security teams frequently need to deploy new log collection rules, enable File Integrity Monitoring (FIM), adjust Security Configuration Assessment (SCA) policies, or onboard new applications for monitoring.

A single configuration change can be propagated across thousands of agents in minutes, significantly reducing operational effort.

Compared to editing individual ossec.conf files, centralized configuration offers several advantages:

Eliminates repetitive manual updates
Maintains consistent security policies across all endpoints
Reduces human error caused by inconsistent configurations
Speeds up deployment of new monitoring policies
Simplifies troubleshooting and configuration management

Throughout this guide, you’ll learn how Wazuh Agent Centralized Configuration works, how configuration synchronization occurs between the manager and agents, how to configure centralized policies safely, common deployment scenarios, troubleshooting techniques, and best practices for managing large-scale Wazuh environments.

What Is Wazuh Agent Centralized Configuration?

Wazuh Agent Centralized Configuration is a management feature that allows administrators to define agent settings on the Wazuh manager instead of configuring each endpoint individually.

The manager stores agent configuration files and automatically distributes them to connected agents, providing centralized control over monitoring policies.

Rather than modifying each agent’s local ossec.conf file, administrators create centralized configuration files that apply to individual agents or groups of agents.

When an agent checks in with the manager, it downloads the latest approved configuration and applies the changes automatically.

This architecture creates a clear separation of responsibilities:

The Wazuh manager acts as the central configuration authority.
Wazuh agents periodically check for updated configurations.
The manager validates and distributes configuration files.
Agents apply supported configuration sections without requiring manual editing.

This synchronization process helps ensure every endpoint follows the same monitoring policies.

If administrators update log collection rules, File Integrity Monitoring paths, or rootcheck settings, the manager distributes those changes automatically during the agent’s next synchronization cycle.

Configuration synchronization follows a straightforward workflow:

An administrator updates the centralized configuration on the Wazuh manager.
The manager validates the XML syntax.
Connected agents periodically request updated configurations.
Agents download the new configuration.
The agent reloads supported modules using the updated settings.

Because the manager remains the authoritative source of configuration, organizations can maintain standardized security monitoring across distributed infrastructure without individually managing every endpoint.

Wazuh Agent Centralized Configuration is supported in modern Wazuh releases and continues to be the recommended approach for managing medium and large deployments.

Before enabling centralized configuration, it’s always advisable to verify compatibility with your installed version by consulting the official Wazuh documentation.

For administrators already managing agent deployments, centralized configuration complements automated enrollment and large-scale deployment workflows.

Related Guides:

Expert Insight: The Wazuh documentation recommends centralized configuration as the preferred way to manage common agent settings because it reduces administrative complexity while maintaining consistent configurations across distributed environments.

Benefits of Wazuh Agent Centralized Configuration

Centralized configuration provides much more than convenience.

It fundamentally changes how administrators manage security monitoring across distributed environments by reducing repetitive tasks while improving consistency and reliability.

Manage Thousands of Agents from One Place

One of the biggest advantages is scalability.

Instead of maintaining separate configuration files on every endpoint, administrators manage policies from a single Wazuh manager.

Whether your environment contains 50 endpoints or 20,000, configuration changes can be deployed from one centralized location.

This dramatically reduces the operational effort required to maintain enterprise-scale environments.

Ensure Configuration Consistency

Configuration drift is a common problem in large infrastructures.

Over time, manually edited agents often end up with different monitoring rules, excluded directories, log sources, or active modules.

Centralized configuration eliminates this issue by ensuring every assigned agent receives the exact same configuration.

Consistent configurations lead to:

Standardized alert generation
Reliable compliance reporting
Uniform log collection
Predictable detection behavior
Easier troubleshooting

This consistency becomes especially important for regulated industries that require documented and repeatable security monitoring policies.

Reduce Administrative Overhead

Without centralized configuration, every policy change requires administrators to:

Connect to individual systems
Edit local configuration files
Validate XML syntax
Restart services
Verify successful deployment

This process quickly becomes unmanageable as environments grow.

Centralized configuration automates most of these tasks, allowing administrators to spend more time improving security rather than maintaining configuration files.

Deploy Changes Faster

Security threats evolve rapidly, and monitoring policies often need immediate updates.

With centralized configuration, administrators can deploy:

New log sources
Updated File Integrity Monitoring paths
Additional Security Configuration Assessment policies
Active Response settings
Rootcheck changes

to large numbers of agents within minutes instead of hours or days.

This shorter deployment window helps organizations respond more quickly to emerging threats and operational requirements.

Minimize Configuration Errors

Manual editing introduces opportunities for mistakes such as:

XML syntax errors
Typographical errors
Missing configuration sections
Incorrect file paths
Inconsistent module settings

Centralized configuration significantly reduces these risks because administrators maintain a single validated configuration rather than hundreds of independent files.

If configuration issues do occur, they’re easier to identify and correct because every affected agent references the same centralized policy.

If you encounter XML validation problems, this guide can help diagnose them.

Simplify Compliance Audits

Many security frameworks, including CIS Controls, ISO 27001, PCI DSS, and NIST Cybersecurity Framework, emphasize standardized configuration management and consistent security monitoring practices.

Using centralized configuration allows administrators to demonstrate that monitoring policies are applied consistently across managed systems rather than relying on manually maintained endpoint configurations.

This simplifies evidence collection during security audits and reduces the likelihood of configuration discrepancies being discovered during compliance assessments.

Industry Perspective: Both the Center for Internet Security (CIS) and NIST recommend centralized configuration management as a best practice for maintaining secure, consistent, and auditable system configurations across enterprise environments.

Roll Back Configuration Changes Easily

Even carefully tested configuration updates can occasionally produce unexpected results.

Because centralized configuration keeps management in one location, administrators can quickly revert to a previous working configuration without logging into every endpoint individually.

This capability reduces downtime, accelerates recovery from configuration mistakes, and makes it safer to deploy improvements across production environments.

For organizations that frequently update monitoring policies, maintaining version-controlled centralized configuration files further improves change management, testing, and rollback procedures.

How Wazuh Agent Centralized Configuration Works

Wazuh Agent Centralized Configuration follows a client-server model where the Wazuh manager serves as the central authority for agent settings.

Instead of administrators modifying the ossec.conf file on every endpoint, the manager stores approved configurations and distributes them to agents based on their assigned groups.

This centralized approach ensures that monitoring policies remain consistent while reducing the time required to deploy configuration changes across an entire environment.

Manager Stores Centralized Configuration

The Wazuh manager stores centralized agent configuration files within its shared configuration directory.

Each agent group has its own configuration file that defines the settings distributed to group members.

These configuration files can include settings for modules such as:

Log collection
File Integrity Monitoring (FIM)
Rootcheck
Security Configuration Assessment (SCA)
Active Response
Command execution
Labels and metadata

Administrators edit these files once on the manager rather than maintaining separate configurations on each endpoint.

The Wazuh manager validates the configuration before making it available to agents, helping prevent invalid XML from being distributed throughout the environment.

Agent Groups

Rather than managing every endpoint individually, Wazuh organizes agents into groups.

A group represents a collection of agents that should share the same monitoring configuration. For example:

Group	Typical Systems
Windows	Windows desktops and servers
Linux	Linux servers
Web Servers	Apache and Nginx servers
Database Servers	MySQL, PostgreSQL, SQL Server
Domain Controllers	Active Directory servers
Kubernetes	Worker and control plane nodes

Each group can have its own centralized configuration, allowing organizations to tailor monitoring policies to different workloads while still managing everything centrally.

Large enterprises often create dozens of specialized groups that correspond to departments, operating systems, cloud providers, or application roles.

Configuration Distribution

After administrators update a group’s configuration, the Wazuh manager makes the new configuration available for agents assigned to that group.

The distribution process generally follows these steps:

Administrator edits the centralized configuration.
Wazuh validates the XML.
The configuration is stored on the manager.
Agents contact the manager during their next synchronization.
Updated configuration files are downloaded.
Supported modules reload using the new settings.

Because agents retrieve their configurations automatically, administrators do not need to manually copy files or log into individual endpoints.

Automatic Configuration Updates

One of the most valuable features of centralized configuration is automatic deployment.

Whenever administrators modify an approved configuration, agents eventually receive the updated settings without requiring manual intervention.

This allows security teams to rapidly deploy:

New monitored log files
Additional FIM directories
Updated SCA policies
Active Response changes
Decoder-related configuration
Rootcheck settings

Automatic updates are especially useful during incident response, when monitoring requirements may change quickly.

For example, if a new application is deployed across hundreds of Linux servers, administrators can update the centralized configuration once instead of editing every server individually.

Configuration Precedence

It’s important to understand that not every setting inside an agent’s local configuration can be overridden by centralized configuration.

Some configuration values remain locally managed, while supported sections are synchronized from the manager.

Generally speaking:

Centralized configuration overrides supported agent settings.
Unsupported settings continue using the local configuration.
Manager-controlled settings become the authoritative version after synchronization.

This precedence model allows organizations to maintain centralized control over monitoring policies while still permitting certain endpoint-specific configurations when necessary.

Administrators should review the official Wazuh documentation to understand which configuration sections support centralized management.

Agent Synchronization Intervals

Agents do not continuously poll the manager for configuration changes.

Instead, they synchronize at regular intervals. During synchronization, the agent checks whether its assigned group configuration has changed.

If a newer configuration exists:

The updated configuration is downloaded.
Integrity is verified.
Supported modules reload automatically.
Monitoring continues using the new policy.

This periodic synchronization minimizes unnecessary network traffic while ensuring configuration changes are distributed efficiently throughout the environment.

In large deployments, synchronization intervals help stagger configuration updates so that thousands of agents are not requesting updates simultaneously.

If agents are not receiving updated configurations as expected, first verify that they are successfully communicating with the manager.

Prerequisites

Before implementing Wazuh Agent Centralized Configuration, verify that your environment is properly prepared.

Completing these prerequisites helps ensure that configuration updates are distributed successfully and minimizes deployment issues.

Working Wazuh Manager Installation

Centralized configuration requires a functioning Wazuh manager.

Before proceeding, confirm that:

The manager service is running
Agent communication is functioning normally
Configuration directories are accessible
The manager is operating without errors

If your manager is experiencing issues, resolve those first before enabling centralized configuration.

Registered Wazuh Agents

Only registered agents can receive centralized configurations.

Verify that:

Agents appear in the Wazuh Dashboard
Agents are connected
Agent keys are valid
Agent status is Active

If agents are missing or registration has failed, resolve those issues before continuing.

Helpful resources include:

Administrative Access

Administrators need sufficient privileges to:

Modify centralized configuration files
Create and manage agent groups
Assign agents to groups
Validate configuration changes
Restart services when required

On Linux deployments, this typically requires root or equivalent administrative privileges.

Proper Network Connectivity

Agents must maintain reliable communication with the Wazuh manager to receive updated configurations.

Verify that:

Required ports are open
Firewalls allow manager-agent communication
DNS resolution is functioning
VPN or remote connections remain stable

Connectivity issues can delay or completely prevent configuration synchronization.

If communication problems occur, consult: Wazuh Agent Not Connecting to Manager? 12 Proven Fixes

Agent Groups Created

Centralized configuration is organized around agent groups.

Before deploying custom policies, identify how your environment should be segmented.

Common grouping strategies include:

Operating system
Department
Geographic region
Application role
Cloud provider
Production vs. development
Compliance requirements

Planning groups ahead of time makes future configuration management much easier.

Backup Existing Configurations

Before making large-scale changes, create backups of:

Current centralized configuration files
Existing local ossec.conf files
Custom rules
Custom decoders

Having backups allows administrators to quickly restore a known-good configuration if an unexpected issue occurs after deployment.

For production environments, storing configuration files in a version control system such as Git provides additional protection by enabling change tracking, auditing, and rapid rollback.

Understanding Agent Groups

Agent groups are one of the core building blocks of Wazuh Agent Centralized Configuration.

They allow administrators to organize endpoints logically and apply different monitoring policies without managing every agent individually.

A well-designed group structure greatly simplifies administration as environments continue to grow.

What Are Agent Groups?

An agent group is a logical collection of Wazuh agents that share the same centralized configuration.

Instead of assigning configuration files one agent at a time, administrators assign agents to groups, and every member inherits the group’s monitoring policies.

Groups can represent:

Operating systems
Server roles
Business departments
Cloud environments
Geographic locations
Security sensitivity levels

For example:

Group	Configuration Focus
Linux	Linux logs, FIM, auditd
Windows	Event Logs, Sysmon, Registry
Web Servers	Apache, Nginx, SSL logs
Kubernetes	Container monitoring
PCI Servers	Enhanced compliance monitoring

This organizational model scales far better than individual agent management.

Default Group

Every newly registered Wazuh agent is automatically assigned to the default group.

Unless administrators explicitly move an agent into another group, it receives the centralized configuration defined for the default group.

Many organizations use the default group to deploy baseline security settings such as:

Standard log collection
Basic File Integrity Monitoring
Default Rootcheck policies
Core Security Configuration Assessment checks

Additional groups can then apply specialized monitoring based on workload.

Creating Custom Groups

As environments expand, most organizations create custom groups for different categories of systems.

Examples include:

Windows Servers
Linux Servers
Domain Controllers
Database Servers
Cloud Instances
DMZ Systems
Development Servers
Production Servers

Creating focused groups allows administrators to deploy only the monitoring policies that are relevant to each type of system.

This reduces unnecessary data collection while improving detection quality.

Assigning Agents to Groups

After creating groups, administrators assign agents according to their roles.

Assignments can be performed:

During agent enrollment
After registration
Using automation tools
Through deployment scripts
Via centralized management utilities

Many enterprises automatically assign agents to groups based on operating system, hostname, cloud tags, or deployment pipeline.

This automation eliminates manual configuration work during large-scale deployments.

Multiple Group Membership

Modern Wazuh deployments support assigning an agent to multiple groups.

This allows administrators to combine reusable configurations instead of creating numerous nearly identical groups.

For example, a Linux web server might belong to:

Linux
Production
Apache
PCI
AWS

Each group contributes relevant monitoring settings, making configuration management more modular and easier to maintain.

This approach reduces duplication and improves flexibility as environments evolve.

Group Inheritance Behavior

When an agent belongs to multiple groups, Wazuh evaluates the applicable centralized configurations according to its group processing rules.

Administrators should understand how overlapping settings are handled to avoid unintended configuration conflicts.

To keep inheritance predictable:

Design groups with distinct purposes.
Avoid defining the same setting in multiple groups unless necessary.
Test changes in a staging environment before deploying them broadly.
Document which groups are responsible for specific configuration sections.

A layered strategy, such as a baseline group for all agents and additional role-specific groups, helps create scalable, maintainable centralized configurations while minimizing the risk of conflicting policies.

Expert Insight: The Wazuh project recommends using agent groups to organize endpoints with similar monitoring requirements, allowing administrators to manage large fleets efficiently while applying targeted configurations where needed.

Directory Structure for Centralized Configuration

Understanding how Wazuh stores centralized configuration files makes it much easier to manage agent policies, organize deployments, and troubleshoot configuration issues.

Rather than storing configuration on each endpoint, the Wazuh manager maintains a centralized directory structure that organizes shared configurations by agent group.

Although the exact directory layout may vary slightly depending on your installation method and Wazuh version, the overall structure remains consistent.

Shared Configuration Directory

The shared configuration directory is where the Wazuh manager stores centralized configuration files that are distributed to agents.

Each agent group has its own configuration directory containing the files that should be synchronized to agents assigned to that group.

Administrators typically perform all centralized configuration changes from this location instead of modifying each endpoint’s local ossec.conf.

Group Directories

Each agent group has its own directory within the shared configuration area.

For example, you might have directories representing:

Default
Windows
Linux
Production
Development
Web Servers
Database Servers

Keeping configurations separated by group makes administration significantly easier, especially in environments containing hundreds or thousands of agents.

A typical organization may maintain dozens of group directories, each containing specialized monitoring policies.

Default Configuration

Every Wazuh deployment includes a default agent group.

Agents that have not been explicitly assigned to another group automatically receive the configuration stored for this group.

Many administrators use the default configuration to deploy baseline monitoring, including:

Standard log collection
Core File Integrity Monitoring
Rootcheck
Security Configuration Assessment
Basic labels

Additional groups can then extend monitoring for specialized workloads.

Agent Configuration Files

Within each group directory, you’ll typically find the shared configuration file that contains the XML settings distributed to agents.

These files commonly define:

Log monitoring
File Integrity Monitoring (FIM)
Rootcheck
SCA
Active Response
Labels
Client buffer settings
Localfile entries

Because every agent in the group downloads the same configuration, maintaining these files carefully is essential for consistency.

If you’re unfamiliar with the structure of ossec.conf, this guide provides a detailed overview.

Configuration Backups

Before modifying centralized configuration files, always create a backup.

Recommended backup strategies include:

Copying the existing configuration files
Maintaining dated backup versions
Using Git or another version control system
Testing changes in a staging environment before production

Version control is particularly valuable because it allows administrators to:

Track configuration history
Identify who made changes
Compare revisions
Roll back failed deployments quickly

Best Practice: Treat centralized configuration files as infrastructure code. Storing them in version control enables peer review, change auditing, and controlled deployments, practices widely recommended in modern IT operations and DevOps.

Step 1: Create or Select an Agent Group

Before deploying centralized configuration, you must decide which agents should receive the new policy.

Wazuh accomplishes this through agent groups, allowing administrators to apply different configurations to different categories of systems.

Careful group planning makes future administration much easier.

Creating New Groups

If your deployment requires specialized monitoring, create a new agent group.

Examples include:

Linux Servers
Windows Servers
Domain Controllers
Database Servers
Kubernetes Nodes
Web Servers
Production Systems
PCI Systems

Smaller, purpose-driven groups are generally easier to manage than one large group containing every endpoint.

Using Existing Groups

Many environments already have well-organized agent groups.

Before creating new ones, determine whether an existing group already matches your intended monitoring policy.

Using existing groups helps:

Reduce administrative overhead
Avoid duplicate configurations
Simplify long-term maintenance
Keep the group hierarchy organized

Organizing Groups by Operating System

A common strategy is grouping systems according to their operating system.

Examples include:

Windows
Linux
macOS

Each operating system requires different monitoring policies, log sources, and security modules, making this one of the most common organizational approaches.

Organizing Groups by Department

Organizations often create groups based on business units.

Examples include:

Finance
Human Resources
Engineering
Marketing
Customer Support

Department-based grouping allows administrators to apply monitoring policies specific to each team’s applications and compliance requirements.

Organizing Groups by Environment

Separating environments reduces the risk of production changes affecting development systems.

Typical environments include:

Development
Testing
QA
Staging
Production

This approach is especially useful when testing new centralized configurations before rolling them out organization-wide.

Organizing Groups by Geographic Region

Global organizations frequently organize endpoints by location.

Examples include:

North America
Europe
Asia-Pacific
South America

Regional grouping helps simplify maintenance windows, compliance requirements, and localized monitoring policies.

Organizing Groups by Function

Many organizations create groups based on server roles rather than operating systems.

Examples include:

Web Servers
Database Servers
DNS Servers
Mail Servers
Domain Controllers
Kubernetes Nodes
Docker Hosts

Function-based grouping allows administrators to deploy highly targeted monitoring configurations while avoiding unnecessary data collection.

Step 2: Configure Shared ossec.conf

Once your groups have been created, the next step is defining the shared configuration that each group’s agents will receive.

This configuration is written using XML and follows the same general syntax as the local ossec.conf file, although only supported configuration sections can be centrally managed.

XML Structure

The shared configuration file uses XML syntax.

Every element must be:

Properly nested
Correctly closed
Case-sensitive where applicable
Valid according to Wazuh’s configuration schema

Even a small XML mistake can prevent agents from successfully receiving updated configurations.

Supported Sections

Not every ossec.conf section can be managed centrally.

Commonly supported sections include:

File Integrity Monitoring
Log collection
Rootcheck
Security Configuration Assessment
Labels
Client buffer settings
Active Response
Localfile monitoring

Always verify support for specific configuration blocks in your installed Wazuh version before deployment.

Valid Configuration Blocks

A centralized configuration can contain multiple XML blocks that define different monitoring features.

Examples include:

<syscheck>
<localfile>
<rootcheck>
<sca>
<active-response>
<labels>
<client_buffer>

Grouping related configuration blocks together makes the file easier to maintain and troubleshoot.

Common Configuration Options

Most centralized configurations contain a combination of monitoring modules depending on the organization’s security requirements.

Below are some of the most frequently configured sections.

Log Collection

Centralized log collection allows administrators to specify which log files every agent should monitor.

Examples include:

/var/log/auth.log
/var/log/syslog
Windows Event Logs
Apache access logs
Nginx error logs
Application logs

Related Guides:

File Integrity Monitoring (FIM)

The <syscheck> section defines directories that should be monitored for file changes.

Typical settings include:

Monitored directories
Real-time monitoring
Frequency
Ignore rules
Recursion
File attributes

Syscheck

Within the <syscheck> block, administrators configure:

File hashing
Permission monitoring
Registry monitoring (Windows)
Scheduled scans
Real-time detection

These settings determine how Wazuh detects unauthorized file modifications.

Rootcheck

The <rootcheck> section enables rootkit detection and security auditing.

Typical options include:

Rootkit detection
Malware signatures
Hidden processes
Hidden ports
System auditing

Security Configuration Assessment (SCA)

The <sca> block controls policy-based compliance scanning.

Organizations commonly use it for:

CIS Benchmarks
PCI DSS
HIPAA
ISO 27001
Internal security policies

Active Response

Active Response allows Wazuh to automatically respond to specific security events.

Typical automated actions include:

Blocking IP addresses
Disabling compromised accounts
Executing scripts
Triggering firewall rules

Related Guide: How to Configure Wazuh Active Response

Labels

Labels add metadata to agents.

Common labels include:

Environment
Business unit
Region
Owner
Compliance level

Labels simplify searching, reporting, and rule targeting.

Client Buffer

The <client_buffer> section controls how agents temporarily store events when communication with the manager is interrupted.

Proper tuning helps prevent event loss during temporary network outages.

Localfile Entries

The <localfile> section specifies additional log files that agents should monitor.

Centralized management makes it easy to add new application logs across hundreds or thousands of systems simultaneously.

Step 3: Validate the Configuration

Never deploy a centralized configuration without validating it first.

A single syntax error can prevent configuration synchronization or cause agents to reject the updated policy.

XML Validation

Verify that:

Every tag is properly closed.
Elements are correctly nested.
Invalid characters are not present.
Required fields are included.

Many XML editors can perform validation automatically before deployment.

Syntax Checking

Beyond XML correctness, verify that:

Module names are valid.
Configuration options are supported.
Parameter values are correctly formatted.
Paths exist where required.

Incorrect parameter names or unsupported configuration blocks may be ignored by agents or generate errors.

Common Validation Mistakes

Some of the most common configuration errors include:

Missing closing tags
Incorrect XML nesting
Misspelled element names
Unsupported configuration blocks
Invalid file paths
Duplicate configuration entries

Most deployment failures can be avoided through careful validation before distribution.

Testing Before Deployment

Whenever possible:

Test changes in a lab environment.
Deploy to a small pilot group first.
Verify successful synchronization.
Review manager and agent logs.
Expand deployment only after validation.

A staged rollout greatly reduces the risk of widespread configuration problems.

Step 4: Deploy the Configuration

Once the configuration has been validated, it can be deployed to the appropriate agent group.

Because Wazuh uses centralized management, deployment is significantly faster than editing configuration files on individual endpoints.

Applying Configuration

Save the updated shared configuration file to the appropriate agent group directory.

After saving, the manager makes the updated configuration available to agents assigned to that group.

Reloading Manager

Depending on the type of change and your deployment, you may need to reload or restart the relevant Wazuh manager services so the new configuration is recognized.

Always verify that the manager starts successfully and does not report configuration errors after the reload.

Agent Synchronization

Agents periodically check the manager for updated configurations.

If a newer configuration is available:

It is downloaded automatically.
Supported modules are updated.
Monitoring continues using the new settings.

No manual file copying is required.

Expected Deployment Timeline

The exact time required depends on:

Agent synchronization intervals
Network latency
Number of connected agents
Manager workload

In most environments, configuration updates begin propagating within minutes.

Very large deployments may take longer as agents synchronize according to their scheduled check-in intervals.

Step 5: Verify Agents Receive the Configuration

After deployment, verify that agents have successfully received and applied the new configuration.

This confirmation helps ensure monitoring policies are active across your environment.

Wazuh Dashboard

The Wazuh Dashboard provides a centralized view of connected agents.

Verify that:

Agents remain connected.
No synchronization errors are reported.
Monitoring continues normally.
Expected modules are active.

Agent Status

Review the status of the target agents to confirm they are online and communicating with the manager.

Offline or disconnected agents cannot retrieve updated centralized configurations.

Manager Logs

The manager logs are one of the best places to troubleshoot deployment issues.

Look for entries related to:

Configuration distribution
Synchronization failures
XML parsing errors
Agent communication
Authentication problems

These logs can quickly identify why a configuration was not delivered.

Agent Logs

Agent logs confirm whether a configuration was downloaded and applied successfully.

Review them for:

Successful synchronization messages
Configuration reload events
Parsing errors
Unsupported configuration warnings
Communication failures

Comparing manager and agent logs often provides the fastest path to resolving synchronization issues.

Configuration Checksum

Wazuh uses checksums to determine whether an agent’s centralized configuration matches the version stored on the manager.

When the checksum changes, the agent recognizes that an updated configuration is available and retrieves the new version during its next synchronization cycle.

Monitoring checksum changes can help confirm that configuration updates are propagating as expected.

Monitoring Synchronization

Configuration management should be treated as an ongoing operational process rather than a one-time task.

Regularly monitor:

Agent connectivity
Synchronization success rates
Configuration update status
Failed deployments
Manager health

Proactive monitoring allows administrators to detect synchronization problems early and ensure that all endpoints continue enforcing the intended security policies.

Common Centralized Configuration Examples

One of the biggest advantages of Wazuh Agent Centralized Configuration is the ability to deploy common monitoring policies to hundreds or thousands of endpoints with a single configuration change.

Rather than manually updating each agent, administrators define a shared policy once and allow the Wazuh manager to distribute it automatically.

Below are some of the most common centralized configuration use cases.

Enable File Integrity Monitoring

File Integrity Monitoring (FIM) is one of Wazuh’s core security features.

By configuring the <syscheck> section centrally, administrators can ensure every agent monitors the same critical files and directories.

Common FIM configurations include:

Monitoring system configuration files
Watching web application directories
Detecting unauthorized file modifications
Monitoring Windows Registry keys
Excluding temporary or cache directories
Enabling real-time monitoring for sensitive paths

Organizations often apply different FIM policies to different agent groups.

For example, database servers may monitor configuration files and database binaries, while web servers focus on application directories and web content.

Monitor Custom Application Logs

Many organizations run applications that generate logs outside the default operating system locations.

Using centralized configuration, administrators can deploy new <localfile> entries across all relevant agents without logging into each server.

Examples include:

ERP application logs
CRM logs
Java application logs
Python application logs
Docker container logs
Custom business applications
Middleware platforms

This approach ensures that new applications are incorporated into your monitoring strategy consistently across the environment.

Configure Windows Event Logs

Windows endpoints generate valuable security data through Event Viewer.

Centralized configuration allows administrators to define which Windows Event Logs should be collected across all Windows agents.

Common channels include:

Security
System
Application
Microsoft-Windows-Sysmon/Operational
Windows Defender
PowerShell
DNS Server
Active Directory-related logs

Applying these settings centrally ensures every Windows system follows the same monitoring standards.

Configure Linux Syslog Monitoring

Linux systems typically generate security events through syslog or journald.

Centralized configuration can standardize monitoring for:

Authentication logs
System logs
Kernel logs
Cron activity
SSH authentication
Sudo commands
Package management
Service logs

Maintaining consistent Linux log collection improves visibility across servers while simplifying incident investigations.

Related Guide: How to Monitor Linux Event Logs Using Wazuh

Enable Security Configuration Assessment (SCA)

Security Configuration Assessment (SCA) evaluates systems against security baselines and compliance frameworks.

Using centralized configuration, administrators can enable SCA across specific agent groups and deploy consistent compliance policies.

Common frameworks include:

CIS Benchmarks
PCI DSS
NIST recommendations
ISO 27001
Internal corporate standards

Centralized deployment ensures that every applicable system is evaluated using the same policy definitions.

Configure Active Response

Active Response enables Wazuh to automatically react to detected threats.

Centralized configuration allows administrators to deploy consistent response policies such as:

Blocking malicious IP addresses
Disabling compromised accounts
Executing custom scripts
Updating firewall rules
Triggering automated remediation actions

Applying these policies centrally ensures that every protected endpoint responds consistently to defined security events.

Related Guide: How to Configure Wazuh Active Response

Configure Rootcheck

Rootcheck performs security audits and rootkit detection on monitored systems.

Common centralized Rootcheck settings include:

Rootkit signature scanning
Hidden process detection
Hidden port detection
System auditing
Malware indicator checks

Organizations frequently enable Rootcheck across all Linux servers while tailoring scan schedules based on system roles and maintenance windows.

Add Custom Labels

Labels provide metadata that helps organize and filter agents within the Wazuh Dashboard.

Common labels include:

Label	Example Value
Environment	Production
Department	Finance
Region	North America
Business Unit	Retail
Compliance	PCI DSS
Cloud Provider	AWS
Application	ERP

These labels improve searching, dashboard filtering, alert correlation, and reporting without requiring changes to detection rules.

Configure Client Buffer Settings

The <client_buffer> section determines how agents temporarily store events before sending them to the manager.

Proper client buffer tuning helps:

Prevent event loss during temporary network outages
Reduce dropped events during traffic spikes
Improve reliability for remote offices
Support intermittent VPN connections
Handle temporary manager unavailability

Organizations with geographically distributed agents often adjust buffer settings to improve resilience in environments where network connectivity may fluctuate.

Updating Existing Centralized Configurations

Centralized configuration is not a one-time task.

As your environment evolves, you’ll need to update monitoring policies, onboard new applications, adjust compliance requirements, and respond to emerging threats.

Following a structured update process helps minimize disruptions while maintaining consistent monitoring across your deployment.

Editing Shared Configuration

When updates are required, modify the shared configuration file for the appropriate agent group rather than editing individual endpoints.

Common updates include:

Adding new log sources
Expanding File Integrity Monitoring
Updating SCA policies
Adjusting Active Response rules
Adding labels
Tuning performance settings

Because one file can affect hundreds or thousands of agents, review every change carefully before deployment.

Safe Deployment Strategy

Avoid deploying major configuration changes to every agent simultaneously.

Instead, use a phased deployment strategy:

Test the configuration in a lab environment.
Deploy it to a small pilot group.
Monitor logs and agent behavior.
Expand deployment gradually.
Roll out to production after validation.

This approach limits the impact of configuration errors and provides an opportunity to correct issues before they affect the entire environment.

Version Control

Store centralized configuration files in a version control system such as Git.

Version control provides several advantages:

Tracks every configuration change
Records who made each modification
Supports peer review
Simplifies auditing
Enables rapid rollback
Maintains historical versions

Treating configuration as code aligns with modern DevOps and Infrastructure as Code (IaC) practices.

Expert Insight: Git-based configuration management has become a standard practice in modern infrastructure operations because it improves traceability, collaboration, and rollback capabilities. The principles of Infrastructure as Code promoted by organizations such as the Open Worldwide Application Security Project (OWASP) and cloud providers emphasize version-controlled configuration management for operational reliability.

Testing Before Production

Every configuration change should be validated before reaching production systems.

A recommended testing workflow includes:

Validate XML syntax.
Confirm supported configuration blocks.
Deploy to test agents.
Review manager logs.
Review agent logs.
Verify expected monitoring behavior.
Confirm no unexpected alerts are generated.

Even small changes can produce unintended consequences if they are not tested thoroughly.

Rolling Updates

For large deployments, consider rolling updates instead of deploying changes to every agent at once.

A typical rollout strategy might be:

Development environment
Test environment
Staging systems
Low-risk production servers
Critical infrastructure
Remaining endpoints

Rolling deployments reduce operational risk and allow administrators to detect issues early before they affect the entire organization.

Best Practices

Following established best practices helps ensure that centralized configuration remains scalable, maintainable, and reliable as your Wazuh deployment grows.

Organize Agents into Logical Groups

Avoid creating one large group containing every endpoint.

Instead, organize agents using meaningful categories such as:

Operating system
Business function
Application role
Geographic region
Compliance requirements
Production versus non-production

Logical grouping improves scalability while reducing unnecessary configuration complexity.

Keep Configurations Modular

Design group configurations so each serves a specific purpose.

For example:

Baseline monitoring
Linux-specific settings
Windows-specific settings
Database monitoring
Web server monitoring
Compliance policies

Modular configurations are easier to understand, update, and troubleshoot than large monolithic configurations.

Test Changes in Staging First

Never deploy untested configuration changes directly to production.

Maintain a staging environment that closely mirrors production and use it to:

Validate new monitoring rules
Test XML changes
Verify synchronization
Confirm expected alerts
Measure performance impact

This practice significantly reduces deployment risk.

Validate XML Before Deployment

XML syntax errors remain one of the most common causes of centralized configuration failures.

Before deployment, verify:

Opening and closing tags
XML nesting
Supported configuration sections
Parameter names
File paths
Duplicate entries

Automated XML validation tools can catch many errors before they reach production.

Use Version Control

Maintain every centralized configuration file in a version control repository.

This allows administrators to:

Audit historical changes
Compare revisions
Review pull requests
Restore previous versions quickly
Maintain documentation alongside configuration files

Version control is especially valuable for teams where multiple administrators manage the same Wazuh deployment.

Document Configuration Changes

Every significant configuration change should include documentation covering:

The purpose of the change
The affected agent groups
The implementation date
The administrator responsible
Related change request or ticket numbers
Rollback procedures

Good documentation reduces troubleshooting time and supports compliance audits.

Minimize Group Overlap

While Wazuh supports assigning agents to multiple groups, excessive overlap can make it difficult to determine which configuration settings apply to a given endpoint.

To reduce complexity:

Assign a clear purpose to each group.
Avoid duplicating the same settings across multiple groups.
Use baseline groups for common configurations and specialized groups for role-specific settings.
Periodically review group memberships to eliminate unnecessary overlap.

A simpler group hierarchy is easier to maintain and less prone to configuration conflicts.

Monitor Agent Synchronization

After deploying configuration updates, monitor synchronization activity to ensure agents are receiving and applying the latest settings.

Regularly review:

Connected agent status
Synchronization failures
Manager logs
Agent logs
Configuration distribution success
Communication errors

Early detection of synchronization problems prevents configuration drift across the environment.

Back Up Shared Configurations

Before making significant changes, back up your centralized configuration files.

Effective backup practices include:

Creating timestamped backups
Using automated backup jobs
Storing backups off the manager
Verifying backup integrity
Maintaining version-controlled repositories

Reliable backups make it possible to recover quickly from accidental changes or failed deployments.

Review Configurations Regularly

Centralized configurations should be reviewed on a scheduled basis rather than left unchanged indefinitely.

Periodic reviews help ensure that:

Obsolete log sources are removed.
New applications are monitored.
Compliance policies remain current.
Performance settings are still appropriate.
Agent groups reflect the current infrastructure.
Legacy configuration blocks are retired.

Industry Perspective: The NIST Guide for Security-Focused Configuration Management (SP 800-128) recommends continuously reviewing and maintaining secure configurations throughout a system’s lifecycle to reduce configuration drift and ensure systems remain aligned with organizational security requirements.

Common Problems and Troubleshooting

Although Wazuh Agent Centralized Configuration simplifies large-scale management, configuration issues can still occur due to connectivity problems, incorrect group assignments, syntax errors, unsupported options, or permission problems.

Understanding the most common failure scenarios helps administrators quickly identify why agents are not receiving or applying centralized configurations.

Agents Not Receiving Configuration

One of the most common centralized configuration issues is when agents continue running their previous settings instead of receiving updated policies from the Wazuh manager.

This prevents new monitoring rules, log sources, and security policies from being applied.

Possible Causes

Several issues can prevent agents from receiving updated configurations:

Agent cannot communicate with the Wazuh manager
Agent is assigned to the wrong group
Configuration synchronization has not occurred yet
Manager service issues
Invalid centralized configuration files
Network connectivity problems
Agent version compatibility issues

Connectivity Issues

Agents must maintain communication with the Wazuh manager to download centralized configurations.

Common connectivity problems include:

Firewall restrictions
Incorrect manager address
Network outages
DNS resolution failures
VPN connectivity problems
Agent authentication failures

Verify that affected agents are connected and actively communicating with the manager.

Useful troubleshooting resources:

Wrong Group Assignment

Centralized configurations are applied based on agent group membership.

If an agent belongs to the wrong group, it will receive the wrong configuration, or no expected configuration at all.

Common examples include:

Windows server assigned to Linux group
Production server assigned to development group
New agent remaining in the default group
Missing custom group assignment

Verify that the agent belongs to the intended group before troubleshooting deeper issues.

Synchronization Delays

Agents do not retrieve configuration changes instantly.

Depending on:

Agent synchronization intervals
Network latency
Manager workload
Number of connected agents

there may be a delay before updated configurations appear.

Before assuming a failure, allow sufficient time for agents to synchronize.

Invalid XML Syntax

XML formatting problems are another common cause of centralized configuration failures.

Because Wazuh configuration files use XML, even a small syntax mistake can prevent successful deployment.

Symptoms

Common signs of invalid XML include:

Agents not receiving updates
Manager startup failures
Configuration validation errors
Parsing errors in logs
Modules failing to start

Configuration Rejected

When the Wazuh manager detects invalid XML, it may reject the configuration rather than distribute a broken policy to agents.

This prevents invalid monitoring settings from spreading throughout the environment.

Manager Errors

Review Wazuh manager logs for messages related to:

XML parsing failures
Invalid tags
Unknown configuration options
Malformed sections

The manager logs usually provide the exact location where the configuration problem occurred.

Resolution

To resolve XML-related problems:

Review the configuration file.
Validate XML syntax.
Check opening and closing tags.
Confirm supported configuration sections.
Remove invalid options.
Restart or reload services if required.

A staging environment should always be used before deploying major configuration changes.

Configuration Not Applying

Sometimes agents successfully receive a configuration but do not apply the expected settings.

This usually occurs when the configuration contains unsupported options, incorrect XML structure, or deployment issues.

Possible Causes

Common causes include:

Unsupported configuration modules
Incorrect XML hierarchy
Manager not reloaded
Agent service restart required
Configuration placed in the wrong group
Conflicting settings

Unsupported Options

Not every ossec.conf option supports centralized deployment.

If a configuration block is not supported, the agent may ignore it or fail to apply the expected behavior.

Always verify that the configuration section supports centralized management before deployment.

Incorrect XML Hierarchy

XML hierarchy matters.

For example, placing a <localfile> block inside the wrong parent element can cause Wazuh to ignore the configuration.

Common hierarchy mistakes include:

Incorrect nesting
Missing parent sections
Duplicate sections
Incorrect closing tags

Manager Not Reloaded

After making configuration changes, the Wazuh manager may need to reload the updated configuration.

If the manager continues running with the previous configuration, agents will not receive the latest version.

Always verify the manager recognizes the updated configuration after changes.

Incorrect Group Assignment

Incorrect group membership is one of the easiest problems to overlook.

An agent may appear healthy but receive completely different settings because it belongs to the wrong group.

Detecting Group Issues

Check:

Agent group membership
Expected configuration source
Dashboard agent information
Manager group assignments

Compare the agent’s assigned group with the intended centralized configuration.

Fixing Agent Membership

To correct group issues:

Identify the correct group.
Move the agent into the appropriate group.
Confirm the manager recognizes the change.
Wait for synchronization.
Verify the new configuration.

For large environments, automate group assignments during deployment to prevent manual errors.

Configuration Conflicts

Configuration conflicts occur when agents receive multiple overlapping settings from different groups or when duplicate configuration entries exist.

Multiple Group Configurations

Agents assigned to multiple groups may inherit settings from several centralized configurations.

While this provides flexibility, it can also introduce complexity.

Examples:

Multiple groups defining the same log source
Different FIM policies targeting the same directory
Conflicting Active Response rules

Duplicate Settings

Duplicate configuration entries can cause:

Duplicate alerts
Unexpected monitoring behavior
Confusing troubleshooting results
Increased resource usage

Review configurations regularly to identify repeated settings.

Unexpected Behavior

Configuration conflicts may appear as:

Logs being collected unexpectedly
Missing monitoring events
Duplicate alerts
Modules behaving differently than expected

Simplifying group structures and removing unnecessary overlap usually resolves these issues.

Agents Using Old Configuration

Sometimes agents continue using older settings even after a centralized configuration update.

Cache Issues

Agents may temporarily retain previous configuration information.

Potential solutions include:

Waiting for synchronization
Restarting the agent service
Verifying manager communication
Checking configuration timestamps

Synchronization Timing

Remember that centralized configuration updates are not pushed instantly.

Agents retrieve updates during scheduled synchronization cycles.

Large deployments may require additional time for all endpoints to update.

Restart Requirements

Some configuration changes require an agent restart before becoming active.

Examples include:

Module changes
Service-level settings
Certain monitoring options

Always verify whether the modified configuration requires a restart.

Permissions Problems

File permissions can prevent the Wazuh manager from reading or distributing centralized configurations.

Shared Directory Permissions

Verify that:

The Wazuh service account can access configuration files.
Directories have appropriate permissions.
Files are readable by the manager process.

Incorrect permissions may prevent configuration loading.

File Ownership

Configuration files should have proper ownership.

Incorrect ownership can occur after:

Manual file copying
Restoring backups
Git deployments
Automation scripts

Verify ownership after making changes.

SELinux/AppArmor Considerations

Security frameworks such as SELinux and AppArmor may block Wazuh from accessing required files.

Potential symptoms include:

Permission denied errors
Configuration loading failures
Unexpected service behavior

Review security policies if standard file permission checks do not identify the problem.

Security Best Practices

Centralized configuration provides powerful control over thousands of endpoints, but improper access management can create significant security risks.

Protecting configuration files and controlling who can modify them is essential for maintaining a secure Wazuh deployment.

Restrict Access to Shared Configurations

Centralized configurations should only be accessible to authorized administrators.

Restrict access to:

Wazuh administrators
Security engineers
Approved automation systems

Avoid allowing unnecessary users to modify monitoring policies.

Apply Least Privilege

Follow the principle of least privilege when assigning permissions.

Users should only have access required for their responsibilities.

Examples:

Analysts should have read-only access.
Administrators should have modification privileges.
Automation systems should use dedicated accounts.

Audit Configuration Changes

Track all configuration modifications.

Maintain records of:

Who changed the configuration
What changed
When it changed
Why the change occurred
Which systems were affected

Audit trails improve accountability and simplify compliance reviews.

Store Configurations in Git

Version control provides a secure method for managing centralized configurations.

Benefits include:

Change history
Code review
Approval workflows
Rollback capability
Configuration comparison

Git-based workflows help prevent unauthorized or accidental changes.

Encrypt Management Communications

Ensure communication between Wazuh managers and agents uses secure channels.

Encrypted communication protects:

Configuration data
Authentication information
Security events
Agent metadata

Proper certificate management is critical for secure deployments.

Related Guide: How to Fix Wazuh Certificate Errors

Review Group Membership Regularly

Agent groups should reflect the current infrastructure.

Regular reviews help identify:

Retired systems
Incorrect assignments
Missing agents
Overlapping memberships

Keeping groups clean improves configuration accuracy.

Remove Deprecated Settings

Over time, configurations accumulate outdated options.

Regularly remove:

Unused log sources
Old applications
Legacy monitoring rules
Deprecated settings

Reducing configuration complexity improves reliability.

Monitor Configuration Drift

Configuration drift occurs when systems no longer match intended security policies.

Monitor for:

Agents missing updates
Unexpected configuration differences
Failed synchronizations
Manual endpoint changes

Centralized configuration reduces drift, but continuous monitoring ensures long-term consistency.

Real-World Example

Scenario

A global enterprise manages more than 6,000 endpoints, including Windows workstations, Linux servers, cloud instances, and remote laptops distributed across multiple business units and geographic locations.

The organization’s Security Operations Center (SOC) relies on Wazuh for centralized security monitoring, threat detection, compliance reporting, and incident response.

Challenge

Before implementing centralized configuration, administrators manually updated each Wazuh agent whenever monitoring requirements changed.

Common changes included:

Adding new application logs
Updating File Integrity Monitoring policies
Enabling new Security Configuration Assessment checks
Adjusting Windows Event Log collection

This manual approach created several operational problems:

Configuration updates took several days.
Different environments had inconsistent policies.
Human errors caused monitoring gaps.
Compliance reporting became more difficult.
Security teams lacked confidence that all endpoints followed the same standards.

Solution

The security team implemented Wazuh Agent Centralized Configuration using a structured group-based management strategy.

Agents were organized using groups based on:

Operating system
Environment
Business function
Cloud infrastructure

Example groups included:

Windows Production
Linux Production
Cloud Infrastructure
Development Systems
Remote Endpoints

Shared ossec.conf files were created for each group and managed through Git version control.

The deployment process included:

Creating centralized configurations.
Testing changes in a staging environment.
Validating XML syntax.
Reviewing changes through version control.
Deploying configurations from the Wazuh manager.
Monitoring synchronization across thousands of agents.

New monitoring capabilities, including:

File Integrity Monitoring policies
Windows Event Log collection
Custom application logs
SCA checks
Detection settings

were automatically distributed without manually accessing individual systems.

Result

After implementing centralized configuration, the organization achieved:

Configuration deployment reduced from several days to minutes.
Consistent monitoring policies across thousands of endpoints.
Reduced configuration drift between environments.
Faster compliance evidence collection.
Lower administrative workload.
Improved SOC visibility across the entire infrastructure.

The security team could now update monitoring policies once and confidently apply those changes across the entire organization.

Centralized configuration transformed Wazuh management from a manual endpoint-by-endpoint process into a scalable enterprise security operations workflow.

Frequently Asked Questions (FAQ)

Question: What is Wazuh Agent Centralized Configuration?

Wazuh Agent Centralized Configuration is a feature that allows administrators to manage agent settings from the Wazuh manager instead of manually editing configuration files on every endpoint.

The Wazuh manager stores shared configuration files and distributes them to agents based on their assigned groups.

This allows organizations to manage monitoring policies, log collection settings, File Integrity Monitoring rules, SCA policies, and other supported configurations from a single location.

Centralized configuration is especially useful for large environments where manually maintaining hundreds or thousands of ossec.conf files would be inefficient and error-prone.

Question: Which settings can be managed centrally?

Many commonly used Wazuh agent settings can be managed through centralized configuration.

Examples include:

File Integrity Monitoring (syscheck)
Log collection (localfile)
Rootcheck
Security Configuration Assessment (SCA)
Active Response
Client buffer settings
Labels
Custom monitoring configurations

However, not every ossec.conf option supports centralized management.

Administrators should verify compatibility with their installed Wazuh version before deploying configuration changes.

Question: Does centralized configuration override the local `ossec.conf`?

Centralized configuration does not completely replace the local agent configuration.

Instead, it manages specific supported configuration sections and distributes those settings from the Wazuh manager.

The final configuration applied by an agent depends on:

Supported centralized configuration sections
Local agent settings
Group assignments
Configuration precedence rules

Administrators should avoid creating conflicting settings between local and centralized configurations because this can make troubleshooting more difficult.

Question: How often do agents check for configuration updates?

Agents periodically communicate with the Wazuh manager to determine whether a newer centralized configuration is available.

The update timing depends on factors such as:

Agent synchronization settings
Network conditions
Manager workload
Number of connected agents

Configuration changes are not always applied immediately. In large environments, administrators should allow time for all agents to synchronize.

Question: Can an agent belong to multiple groups?

Yes. Wazuh supports assigning agents to multiple groups.

Multiple group membership allows administrators to create flexible configuration structures.

For example, a production Linux web server could belong to:

Linux Servers
Production
Web Servers
PCI Systems

This allows administrators to apply different monitoring policies based on operating system, environment, and business requirements.

However, excessive group overlap can create complexity and configuration conflicts. Groups should be designed carefully with clear responsibilities.

Question: How do I know if an agent received the latest configuration?

Several methods can confirm whether an agent successfully received centralized configuration updates:

Check the Wazuh Dashboard
Review agent status
Examine manager logs
Review agent logs
Verify configuration synchronization messages
Compare configuration versions or checksums

If an agent does not appear updated, investigate:

Connectivity issues
Incorrect group assignments
XML errors
Synchronization delays

Question: Can I deploy different configurations to Windows and Linux agents?

Yes.

This is one of the main benefits of using agent groups.

Administrators can create separate configurations for different operating systems, such as:

Windows agents:

Windows Event Logs
Registry monitoring
PowerShell logs
Sysmon monitoring

Linux agents:

SSH authentication logs
Syslog monitoring
Linux configuration files
Audit logs

By separating agents into operating system-specific groups, organizations can deploy relevant monitoring policies without collecting unnecessary data.

Related Guide:

Question: Do agents need to be restarted after receiving a centralized configuration?

In many cases, agents automatically apply centralized configuration updates without requiring a manual restart.

However, some changes may require restarting the agent service before becoming active.

Restart requirements depend on:

Configuration section modified
Wazuh version
Agent operating system
Module behavior

If a configuration change does not appear active after synchronization, check agent logs and restart the service if necessary.

Question: How do I roll back a configuration change?

The safest way to roll back centralized configuration changes is by restoring a previous known-good configuration version.

Recommended rollback methods include:

Restoring a previous Git commit
Deploying a backup configuration
Reverting the affected group configuration
Redeploying the previous policy version

Using version control makes rollback significantly faster because administrators can identify exactly what changed and restore earlier configurations.

Question: What happens if the centralized configuration contains invalid XML?

If a centralized configuration contains invalid XML, Wazuh may reject the configuration or generate errors during validation.

Common causes include:

Missing closing tags
Incorrect nesting
Unsupported elements
Typographical mistakes
Duplicate configuration blocks

Potential symptoms include:

Agents not receiving updates
Manager errors
Configuration loading failures
Unexpected monitoring behavior

Always validate XML syntax before deploying changes to production systems.

Question: Is centralized configuration secure?

Yes, when properly managed.

Centralized configuration improves security by providing controlled management of monitoring policies from the Wazuh manager.

Security best practices include:

Restricting access to configuration files
Applying least privilege
Encrypting manager-agent communication
Auditing configuration changes
Using version control
Reviewing administrator permissions

Because centralized configuration controls security monitoring behavior across many systems, protecting these files is critical.

Question: What is the difference between centralized configuration and local agent configuration?

The primary difference is where configuration management occurs.

Feature	Centralized Configuration	Local Agent Configuration
Management location	Wazuh manager	Individual endpoint
Scalability	High	Low for large environments
Deployment method	Automatic synchronization	Manual editing
Best for	Enterprise deployments	Small or custom configurations
Change management	Centralized	Endpoint-by-endpoint
Risk of configuration drift	Lower	Higher

Local configuration can still be useful for endpoint-specific settings, but centralized configuration is generally preferred for consistent security monitoring across large deployments.

Conclusion

Managing Wazuh agents individually becomes increasingly difficult as environments grow.

Organizations with hundreds or thousands of endpoints need a scalable approach that ensures every system follows the same security monitoring standards.

Wazuh Agent Centralized Configuration solves this challenge by allowing administrators to manage agent policies from the Wazuh manager and automatically distribute updates through agent groups.

By adopting centralized configuration, organizations can:

Manage thousands of agents from one location
Maintain consistent monitoring policies
Reduce manual administration
Deploy security changes faster
Minimize configuration errors
Simplify compliance audits
Reduce configuration drift

Agent groups provide the foundation for scalable management by allowing administrators to organize systems based on operating system, environment, business function, and security requirements.

A well-designed centralized configuration strategy should include:

Logical agent grouping
Standardized configuration templates
Version-controlled changes
Testing before production deployment
Regular configuration reviews
Continuous synchronization monitoring

As Wazuh deployments expand, centralized configuration becomes essential for maintaining visibility, consistency, and operational efficiency across an organization’s entire security infrastructure.

By moving away from manual endpoint-by-endpoint management and adopting standardized centralized practices, security teams can build a more reliable and scalable Wazuh environment capable of supporting modern enterprise requirements.

How to Configure Wazuh Agent Centralized Configuration

What Is Wazuh Agent Centralized Configuration?

Benefits of Wazuh Agent Centralized Configuration

Manage Thousands of Agents from One Place

Ensure Configuration Consistency

Reduce Administrative Overhead

Deploy Changes Faster

Minimize Configuration Errors

Simplify Compliance Audits

Roll Back Configuration Changes Easily

How Wazuh Agent Centralized Configuration Works

Manager Stores Centralized Configuration

Agent Groups

Configuration Distribution

Automatic Configuration Updates

Configuration Precedence

Agent Synchronization Intervals

Prerequisites

Working Wazuh Manager Installation

Registered Wazuh Agents

Administrative Access

Proper Network Connectivity

Agent Groups Created

Backup Existing Configurations

Understanding Agent Groups

What Are Agent Groups?

Default Group

Creating Custom Groups

Assigning Agents to Groups

Multiple Group Membership

Group Inheritance Behavior