Wondering how to Install Wazuh Server on CentOS 7? We will help you with it.

Wazuh is a free, open-source and enterprise-ready security monitoring solution for threat detection, integrity monitoring, incident response and compliance.

Here at Bobcares, we handle requests from our customers to Install Wazuh Server on CentOS 7 as a part of Server Management Services.

Today, let us see how our Support techs resolve this issue for our customers.

 

Install Wazuh Server on CentOS 7

In this article, let us see Distributed architecture installation.

Wazuh manager and Elastic Stack are managed on the same platform by single-host implementations.

* Wazuh server: Runs the API and Wazuh Manager. The data from deployed agents are collected and analyzed.
* Elastic Stack: Runs Elasticsearch, Filebeat and Kibana (including Wazuh). It reads, parses, indexes and stores Wazuh manager alert data.
* Wazuh agent: Runs on the host monitored, collecting log and configuration data, and detecting intrusions and anomalies.

Today, let us see how our support Techs install Wazuh.

1. Installing Wazuh Server

Let us set the hostname first. Launch Terminal and enter the following command:

# hostnamectl set-hostname wazuh-serverCopy Code

Firstly, update CentOS and packages:

# yum update -yCopy Code

Next, install NTP and check its service status.

# yum install ntp
# systemctl status ntpdCopy Code

If the service is not started, start it using below command:

# systemctl start ntpdCopy Code

Then, enable NTP on system boot:

# systemctl enable ntpdCopy Code

Next, modify firewall rules to allow NTP service. Run the following commands to enable service.

# firewall-cmd –add-service=ntp –zone=public –permanent
# firewall-cmd –reloadCopy Code

Installing Wazuh Manager

Let us add key:

# rpm –import https://packages.wazuh.com/key/GPG-KEY-WAZUHCopy Code

Edit the Wazuh repository:

# vim /etc/yum.repos.d/wazuh.repoCopy Code

Add the following content to the file.

[wazuh_repo]
gpgcheck=1
gpgkey=https://packages.wazuh.com/key/GPG-KEY-WAZUH
enabled=1
name=Wazuh repository
baseurl=https://packages.wazuh.com/3.x/yum/
protect=1Copy Code

Save and exit the file.

List the repositories using the repolist command.

# yum repolistCopy Code

Firstly, install the Wazuh manager using the below command:

# yum install wazuh-manager -yCopy Code

Then, install Wazuh Manager and check the status of it.

# systemctl status wazuh-managerCopy Code

Installing the Wazuh API

NodeJS >= 4.6.1 is required to run the Wazuh API.Copy Code

Then, add the official NodeJS repository:

# curl –silent –location https://rpm.nodesource.com/setup_8.x | bash –
install NodeJS:
# yum install nodejs -yCopy Code

Install the Wazuh API. It will update NodeJS if it is required:

# yum install wazuh-apiCopy Code

Then, check the status of wazuh-api.

# systemctl status wazuh-apiCopy Code

Change the default credentials manually using the following commands:

# cd /var/ossec/api/configuration/authCopy Code

Set a password for the user.

# node htpasswd -Bc -C 10 user bobCopy Code

Restart API.

# systemctl restart wazuh-apiCopy Code

If we need it, we can change the port manually. The file /var/ossec/api/configuration/config.js contains the parameter:

// TCP Port used by the API.
config.port = “55000”;Copy Code

We are not changing the default port.

Installing Filebeat

Filebeat is the tool on the Wazuh server that securely forwards alerts and archived events to Elasticsearch. To install it, run the following command:

# rpm –import https://packages.elastic.co/GPG-KEY-elasticsearchCopy Code

Setup repository:

# vim /etc/yum.repos.d/elastic.repoCopy Code

Add the following contents to the server:

[elasticsearch-7.x]
name=Elasticsearch repository for 7.x packages
baseurl=https://artifacts.elastic.co/packages/7.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=1
autorefresh=1
type=rpm-mdCopy Code

Install Filebeat:

# yum install filebeat-7.5.1Copy Code

Download the Filebeat configuration file from the Wazuh repository. This is pre-configured to forward Wazuh alerts to Elasticsearch:

# curl -so /etc/filebeat/filebeat.yml https://raw.githubusercontent.com/wazuh/wazuh/v3.11.0/extensions/filebeat/7.x/filebeat.ymlCopy Code

Change file Permissions:

# chmod go+r /etc/filebeat/filebeat.ymlCopy Code

Download the alerts template for Elasticsearch:

# curl -so /etc/filebeat/wazuh-template.json https://raw.githubusercontent.com/wazuh/wazuh/v3.11.0/extensions/elasticsearch/7.x/wazuh-template.json
# chmod go+r /etc/filebeat/wazuh-template.jsonCopy Code

Download the Wazuh module for Filebeat:

# curl -s https://packages.wazuh.com/3.x/filebeat/wazuh-filebeat-0.1.tar.gz | sudo tar -xvz -C /usr/share/filebeat/moduleCopy Code

Add Elasticsearch server IP. Edit “filebeat.yml.”

# vim /etc/filebeat/filebeat.ymlCopy Code

Then, modify the following line.

output.elasticsearch.hosts: [‘http://ELASTIC_SERVER_IP:9200′]Copy Code

Next, enable and start the Filebeat service:

# systemctl daemon-reload
# systemctl enable filebeat.service
# systemctl start filebeat.serviceCopy Code

2. Installing Elastic Stack

We can configure second CentOS server with ELK.

Do the configurations on elastic stack server.

Firstly, let us set hostname.

# hostnamectl set-hostname elkCopy Code

Then, update the system:

# yum update -yCopy Code

Installing ELK

Install Elastic Stack with RPM packages and then add the Elastic repository and its GPG key:

# rpm –import https://packages.elastic.co/GPG-KEY-elasticsearchCopy Code

Later, create a repository file:

# vim /etc/yum.repos.d/elastic.repoCopy Code

Then, add the following content to the file:

[elasticsearch-7.x]
name=Elasticsearch repository for 7.x packages
baseurl=https://artifacts.elastic.co/packages/7.x/yum
gpgcheck=1
gpgkey=https://artifacts.elastic.co/GPG-KEY-elasticsearch
enabled=1
autorefresh=1
type=rpm-mdCopy Code

Installing Elasticsearch

Firstly, Install the Elasticsearch package:

# yum install elasticsearch-7.5.1Copy Code

Elasticsearch listens by default on the loopback interface (localhost). Configure Elasticsearch to listen to a non-loopback address by editing /etc/elasticsearch/elasticsearch.yml and uncommenting network.host configuration. Adjust the IP value we want to connect to:

network.host: 0.0.0.0

Change firewall rules.

# firewall-cmd –permanent –zone=public –add-rich-rule=’
rule family=”ipv4″
source address=”34.232.210.23/32″
port protocol=”tcp” port=”9200″ accept’Copy Code

Next, reload firewall rules:

# firewall-cmd –reloadCopy Code

The further configuration will be necessary for the elastic search configuration file.

Edit the “elasticsearch.yml” file.

# vim /etc/elasticsearch/elasticsearch.ymlCopy Code

Change or edit “node.name” and “cluster.initial_master_nodes”.

node.name: <node_name>
cluster.initial_master_nodes: [“<node_name>”]Copy Code

Enable and start the Elasticsearch service:

# systemctl daemon-reloadCopy Code

Firstly, enable on system boot.

# systemctl enable elasticsearch.serviceCopy Code

Then, start elastic search service.

# systemctl start elasticsearch.service
Check the status of the elastic search.Copy Code

systemctl status elasticsearch.service

Next, check the log file for any issues.

# tail -f /var/log/elasticsearch/elasticsearch.logCopy Code

Once Elasticsearch is up and running, we need to load the Filebeat template. Run the following command on the Wazuh server:

filebeat setup –index-management -E setup.template.json.enabled=falseCopy Code

Installing Kibana

Firstly, Install the Kibana package:

# yum install kibana-7.5.1Copy Code

Install the Wazuh app plugin for Kibana:

# sudo -u kibana /usr/share/kibana/bin/kibana-plugin install https://packages.wazuh.com/wazuhapp/wazuhapp-3.11.0_7.5.1.zipCopy Code

Kibana Plugin is needed to modify Kibana configurations to access Kibana from the outside.

Edit the Kibana configuration file.

#vim /etc/kibana/kibana.ymlCopy Code

Change the following line.

server.host: “0.0.0.0”

Configure the URLs of the Elasticsearch instances.

elasticsearch.hosts: [“http://localhost:9200”]Copy Code

Then, enable and start the Kibana service:

# systemctl daemon-reload
# systemctl enable kibana.service
# systemctl start kibana.serviceCopy Code

Adding Wazuh API to Kibana Configurations

Edit “wazuh.yml.”

# vim /usr/share/kibana/plugins/wazuh/wazuh.ymlCopy Code

Then, edit hostname, username and password.

Finally, save and exit the file and restart the Kibana service.

# systemctl restart kibana.serviceCopy Code

We installed the Wazuh server and the ELK server. Now we are going to add hosts using an agent.

3. Installing Wazuh agent

I. Adding Ubuntu Server

a. Firstly, nstalling needed packages

# apt-get install curl apt-transport-https lsb-release gnupg2Copy Code

Install the Wazuh repository GPG key:

# curl -s https://packages.wazuh.com/key/GPG-KEY-WAZUH | apt-key add –Copy Code

Add the repository and then update repositories.

# echo “deb https://packages.wazuh.com/3.x/apt/ stable main” | tee /etc/apt/sources.list.d/wazuh.list
# apt-get updateCopy Code

b. Then, installing the Wazuh agent

Below command adds “WAZUH_MANAGER” IP to wazuh-agent configuration automatically when installing it.

WAZUH_MANAGER=”52.91.79.65″ apt-get install wazuh-agentCopy Code

II. Adding CentOS host

Add the Wazuh repository.

# rpm –import http://packages.wazuh.com/key/GPG-KEY-WAZUHCopy Code

Next, edit and add to the repository:

vim /etc/yum.repos.d/wazuh.repCopy Code

Then, add the following contents:

[wazuh_repo]
gpgcheck=1
gpgkey=https://packages.wazuh.com/key/GPG-KEY-WAZUH
enabled=1
name=Wazuh repository
baseurl=https://packages.wazuh.com/3.x/yum/
protect=1Copy Code

Then, install the agent.

WAZUH_MANAGER=”52.91.79.65″ yum install wazuh-agentCopy Code

4. Accessing Wazuh Dashboard

Firstly, browse Kibana using the IP.

http://IP or hostname:5601/Copy Code

Then, you will see the interface.

Then, click on “Wazuh” Icon to go to its Dashboard. We will see “Wazuh” Dashboard.

Finally, here we can see connected agents, security information management, etc. When we click on security events; we can see a graphical view of events.

 

Common error: Install Wazuh Server on CentOS 7

 

While compiling Wazuh server, it results in the error given below:

CC libwazuhext.so cc: error: external/libffi/server/.libs/libffi.a: No such file or directory make: *** [libwazuhext.so] Error 1

 

Cause for Error while Installing Wazuh Server on CentOS 7

The installer is compiling the libffi library, but the Wazuh’s Makefile is defining a parameter that conflicts with the libffi’s Makefile.

 

Solution

Replace this line:

LIBFFI_LIB = $(EXTERNAL_LIBFFI)server/.libs/libffi.aCopy Code

With:

LIBFFI_LIB = $(EXTERNAL_LIBFFI)$(TARGET)/.libs/libffi.aCopy Code

This script should fix the issue and recompile:

cd src
sed -i ‘s,LIBFFI_LIB = $(EXTERNAL_LIBFFI)server/.libs/libffi.a,LIBFFI_LIB = $(EXTERNAL_LIBFFI)$(TARGET)/.libs/libffi.a,’ Makefile
make clean
cd ..
sudo ./install.shCopy Code

 

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Conclusion

In short, Wazuh is a free, open-source and enterprise-ready security monitoring solution for threat detection, integrity monitoring, incident response and compliance. Today, we saw how our Support Engineers install it.