Install Wazuh Server on CentOS 7 – How to do it

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-server
 
Firstly, update CentOS and packages:
 
# yum update -y
 
Next, install NTP and check its service status.
 
# yum install ntp
# systemctl status ntpd
 
If the service is not started, start it using below command:
 
# systemctl start ntpd
 
Then, enable NTP on system boot:
 
# systemctl enable ntpd
 
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 –reload
 
Installing Wazuh Manager
 
Let us add key:
 
# rpm –import https://packages.wazuh.com/key/GPG-KEY-WAZUH
 
Edit the Wazuh repository:
 
# vim /etc/yum.repos.d/wazuh.repo
 
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=1
 
Save and exit the file.
 
List the repositories using the repolist command.
 
# yum repolist
 
Firstly, install the Wazuh manager using the below command:
 
# yum install wazuh-manager -y
 
Then, install Wazuh Manager and check the status of it.
 
# systemctl status wazuh-manager
 
Installing the Wazuh API
 
NodeJS >= 4.6.1 is required to run the Wazuh API.
 
Then, add the official NodeJS repository:
 
# curl –silent –location https://rpm.nodesource.com/setup_8.x | bash –
install NodeJS:
# yum install nodejs -y
 
Install the Wazuh API. It will update NodeJS if it is required:
 
# yum install wazuh-api
 
Then, check the status of wazuh-api.
 
# systemctl status wazuh-api
 
Change the default credentials manually using the following commands:
 
# cd /var/ossec/api/configuration/auth
 
Set a password for the user.
 
# node htpasswd -Bc -C 10 user bob
 
Restart API.
 
# systemctl restart wazuh-api
 
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”;
 
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-elasticsearch
 
Setup repository:
 
# vim /etc/yum.repos.d/elastic.repo
 
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-md
 
Install Filebeat:
 
# yum install filebeat-7.5.1
 
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.yml
 
Change file Permissions:
 
# chmod go+r /etc/filebeat/filebeat.yml
 
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.json
 
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/module
 
Add Elasticsearch server IP. Edit “filebeat.yml.”
 
# vim /etc/filebeat/filebeat.yml
 
Then, modify the following line.
 
output.elasticsearch.hosts: [‘http://ELASTIC_SERVER_IP:9200′]
 
Next, enable and start the Filebeat service:
 
# systemctl daemon-reload
# systemctl enable filebeat.service
# systemctl start filebeat.service
 
 
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 elk
 
Then, update the system:
 
# yum update -y
 
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-elasticsearch
 
Later, create a repository file:
 
# vim /etc/yum.repos.d/elastic.repo
 
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-md
 
 
Installing Elasticsearch
 
Firstly, Install the Elasticsearch package:
 
# yum install elasticsearch-7.5.1
 
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’
 
Next, reload firewall rules:
 
# firewall-cmd –reload
 
The further configuration will be necessary for the elastic search configuration file.
 
Edit the “elasticsearch.yml” file.
 
# vim /etc/elasticsearch/elasticsearch.yml
 
Change or edit “node.name” and “cluster.initial_master_nodes”.
 
node.name: <node_name>
cluster.initial_master_nodes: [“<node_name>”]
 
Enable and start the Elasticsearch service:
 
# systemctl daemon-reload
 
Firstly, enable on system boot.
 
# systemctl enable elasticsearch.service
 
Then, start elastic search service.
 
# systemctl start elasticsearch.service
Check the status of the elastic search.
 
systemctl status elasticsearch.service
 
Next, check the log file for any issues.
 
# tail -f /var/log/elasticsearch/elasticsearch.log
 
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=false
 
 
Installing Kibana
 
Firstly, Install the Kibana package:
 
# yum install kibana-7.5.1
 
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.zip
 
Kibana Plugin is needed to modify Kibana configurations to access Kibana from the outside.
 
Edit the Kibana configuration file.
 
#vim /etc/kibana/kibana.yml
 
Change the following line.
 
server.host: “0.0.0.0”
 
Configure the URLs of the Elasticsearch instances.
 
elasticsearch.hosts: [“http://localhost:9200”]
 
Then, enable and start the Kibana service:
 
# systemctl daemon-reload
# systemctl enable kibana.service
# systemctl start kibana.service
 
Adding Wazuh API to Kibana Configurations
 
Edit “wazuh.yml.”
 
# vim /usr/share/kibana/plugins/wazuh/wazuh.yml
 
Then, edit hostname, username and password.
 
Finally, save and exit the file and restart the Kibana service.
 
# systemctl restart kibana.service
 
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 gnupg2
 
Install the Wazuh repository GPG key:
 
# curl -s https://packages.wazuh.com/key/GPG-KEY-WAZUH | apt-key add –
 
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 update
 
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-agent
 
II. Adding CentOS host
 
Add the Wazuh repository.
 
# rpm –import http://packages.wazuh.com/key/GPG-KEY-WAZUH
 
Next, edit and add to the repository:
 
vim /etc/yum.repos.d/wazuh.rep
 
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=1
 
Then, install the agent.
 
WAZUH_MANAGER=”52.91.79.65″ yum install wazuh-agent
 
4. Accessing Wazuh Dashboard
 
Firstly, browse Kibana using the IP.
 
http://IP or hostname:5601/
 
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.a
 
With:
 
LIBFFI_LIB = $(EXTERNAL_LIBFFI)$(TARGET)/.libs/libffi.a
 
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.sh
 
 
 
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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.
 
 
 
  
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