Install the CrowdSec Agent

Login to the server using SSH, or VNC with a non-root user who has sudo privileges. To get started, it is recommended that you log into your server with a sudo user. You can do it like this:

ssh any-user@<Your_IP_Address>

Next, it is recommended to download a special script. It will add the given repository – packagecloud.io to the list of sources and the packagecloud.io GPG key to check the downloads. Just copy the command (using curl)

curl -s https://packagecloud.io/install/repositories/crowdsec/crowdsec/script.deb.sh | sudo bash

Install CrowdSec

After successfully installing a special script, you can proceed with the installation of CrowdSec. This can be done by following the following command:

apt install crowdsec

Next, you need to check this installation. Just enter the following command:

systemctl status crowdsec

The result will be something like this:

crowdsec.service - Crowdsec agent
    Loaded: loaded (/lib/systemd/system/crowdsec.service; enabled; vendor pres>
    Active: active (running) since ... etc.

You will be able to upload a list of required manipulations with your CrowdSec. The helper can be called like this command:

cscli machines list

Install a Firewall

It is highly recommended to install a firewall. This will be useful and very important as using the CrowdSec agent to prevent intrusions into your system. Install as below:

apt install crowdsec-firewall-bouncer-iptables -y

You can view the important points regarding the firewall like this:

cscli alerts list

cscli decisions list

cscli metrics