Install RedHat Enterprise 9.1

Prerequisites

Internet access and web browser
VMware (Workstation or Player) or another VM platform
RedHat Enterprise requires Docker Enterprise

The RHEL host should have the following firewall configuration:

Direction	Port	Protocol	Source	Destination	Purpose
Outbound	443	HTTPS	Open Collector	`raw.githubusercontent.com`	Identify latest container versions.
Outbound	443	HTTPS	Open Collector	`*.gcr.io`	Download latest Open Collector software.
Outbound	443	HTTPS	Open Collector	`get.docker.com`	Download docker repositories.
Outbound	443	HTTPS	Open Collector	`cloud.google.com`	Pull container images.
Outbound	443	HTTPS	Open Collector	`storage.googleapis.com`	Auto-update feature.
Outbound	443	HTTPS	Open Collector	`console.cloud.google.com`	Auto-update feature.
Outbound	443	HTTPS	Open Collector	`download.docker.com`	Allows for LRCTL installation of Open Collector
Outbound	443	HTTPS	Open Collector	`registry-1.docker.io`	Allows for LRCTL installation of Open Collector
Outbound	443	HTTPS	Open Collector	`auth.docker.io`	Allows for LRCTL installation of Open Collector
Outbound	443	HTTPS	Open Collector	`production.cloudflare.docker.com`	Allows for LRCTL installation of Open Collector
Outbound	514	TCP - Syslog	Open Collector	Windows System Monitor Agent	Syslog feed of data to LogRhythm SIEM.
Outbound**	6514	TCP+TLS - Secure Syslog	Open Collector	Windows System Monitor Agent	Secure syslog feed of data to LogRhythm SIEM.
Outbound	8076	TCP - Influx/Vitals	Open Collector	Platform Manager	Data feed for Centralized Metrics (LogRhythm 7.5+ only).
Inbound	3000	HTTP	User machine	Open Collector	View Open Collector metrics in Grafana.
Inbound	22	SSH	User machine	Open Collector	Interact with Open Collector.
Inbound	5044	TCP - Lumberjack	Beats	Open Collector	Method to send data from Beats collected outside the Open Collector.

**indicates optional setting

Install RedHat Enterprise 9

Download RedHat Enterprise 9 from https://access.redhat.com/products/red-hat-enterprise-linux/ (license may be required).
Create a VM with the following settings:
- CPU: 8 cores (or more)
- RAM: 8 GB (or more)
- HDD: 50 GB (or more)
- DVD: rhel-baseos-9.1-x86_64-dvd.iso
- User: In addition to the root user, create the following user:
  - ```
  username: logrhythm
```
- ```
password: <enter a password of your choice>
```
Manually install Mirantis Container Runtime or Mirantis Kubernetes Engine (Formerly Docker Enterprise Edition). This must be done before installing the Open Collector on RedHat 9.
Mirantis Kubernetes Engine (Formerly Docker Enterprise Edition) Basic, version 19+ is the officially supported version.

RedHat 9 is only officially supported using Mirantis Container Runtime or Mirantis Kubernetes Engine (Formerly Docker Enterprise Edition).
- Please refer to your vendor specific documentation for Mirantis product installation instructions. Paid license will be required.
  
  Docker CE is not supported on RedHat 8 and will not be available for installation through the ./lrctl init command.
Modify the firewalld settings. This must be done before using Docker on RedHat9, because DNS resolution for containers on Docker does not currently work with nftables.
- Open the firewalld.conf file using vi or nano:
  CODE
```
sudo vi /etc/firewalld/firewalld.conf
```
- In the firewalls.conf config file, change FirewallBackend=nftables to:
  CODE
```
FirewallBackend=iptables
```
- Save your changes and reload firewalld:
  CODE
```
sudo systemctl restart firewalld.service
```
On initial boot, log on as the root user.
Add the new logrhythm user to the sudoers wheel:
CODE
```
usermod -aG wheel logrhythm
```
Reboot the VM, and log on as the logrhythm user.

OS Installation

Boot your VM with your installation media attached to the virtual CD-ROM drive (.iso format).
Select Install Red Hat Enterprise Linux 9.1.
Wait for the media check to complete.
Once the Red Hat installer GUI starts, select your language localization settings, and click Continue.

The Installation Summary screen appears.
In the System section, click Network & Host Name. (This is required to get networking on your VM without manual configuration.)
In the upper-right corner, click the toggle switch to On.

The VM retrieves an IP address and DNS settings using DHCP (IPs and MAC redacted for security reasons).
In the upper-left corner, click Done.
The Installation Summary screen appears.
In the Localization section, click Time & Date.
The Time & Date screen appears.
Confirm the date and time are correct.

You can also use the Network Time (NTP) option (networking must be configured to use this option).
In the upper-left corner, click Done.
The Installation Summary screen appears.
To set a root password, under the User Settings section, click Root Password.
Click User Creation, and create a logrhythm user with a strong password.

You can also create a logrhythm user manually after installation.
(Optional) To disable the default GNOME GUI, click Software Selection in the Software section.
In the System section, click Installation Destination.
the Installation Destination screen appears.
Ensure your local disk is selected. The recommended disk capacity is 50GB.
In the upper-left corner, click Done.
The Installation Summary screen appears.
In the bottom-right corner, click Begin Installation.
Once installation is complete, click Reboot in the lower-right corner.

Make sure to remove the installation media. The method for removal is hypervisor-specific.
Once the system is rebooted, you will be required to register your system.
Click Register System.
The Settings screen appears. Goto About option and click on "Subscription".

The Register System screen appears.
Enter all subscription-related details and click Register in the top right corner.

You must register your Red Hat instance to enable yum repos. You cannot install the Open Collector if you do not register your RedHat 9 instance.
Before using Docker on RedHat Enterprise 9, you must modify the firewalld settings.
1. - Open the firewalld.conf file using vi or nano:
    CODE
```
sudo vi /etc/firewalld/firewalld.conf
```
  - In the firewalls.conf config file, change FirewallBackend=nftables to:
    CODE
```
FirewallBackend=iptables
```
  - Save your changes and reload firewalld:
    CODE
```
sudo systemctl restart firewalld.service
```