How to install Crowdsec

By HelpSysAdmin8 de May de 2022Server Management, Server Management

Este post também está disponível em: Português (Portuguese (Brazil))

CrowdSec is a new security project designed to protect virtual servers(VPS, CLOUD), dedicated servers, exposed on the Internet. CrowdSec installs an agent on the server that analyzes the logs of various applications looking for intrusion attempts. Depending on the configuration these IPs are blocked by the bounce on the server and sent to the Crowdsec network that analyzes and redistributes these IPs creating an increasingly secure and updated network. Crowdsec was inspired by Fail2Ban and aims to be a collaborative and modernized version of this intrusion prevention framework.

In Hub we found
Collections: they are packages of analyzers, scenarios, post-overflows that form a coherent set.
Configurations: are the settings that will detect the types of threats.
Bouncers: are plugins that block ips according to crowdsec “decisions” (BAN, CAPTCHA…) There are several types of integration such as iptables (default), cloudflare firewall, wordpress plugin, magento, windows server firewall and many others.

In this post we will install Crowdsec with “crowdsec-firewall-bouncer-iptables” bouncer.

install the agent

Debian / Ubuntu

curl -s https://packagecloud.io/install/repositories/crowdsec/crowdsec/script.deb.sh | sudo bash
apt-get install crowdsec
systemctl enable crowdsec
systemctl start crowdsec

RHEL / CentOS / Amazon Linux

curl -s https://packagecloud.io/install/repositories/crowdsec/crowdsec/script.rpm.sh | sudo bash
yum install crowdsec
systemctl enable crowdsec
systemctl start crowdsec

Install Bouncer

Debian / Ubuntu

curl -s https://packagecloud.io/install/repositories/crowdsec/crowdsec/script.deb.sh | sudo bash
apt install crowdsec-firewall-bouncer-iptables
systemctl enable crowdsec-firewall-bouncer
systemctl start crowdsec-firewall-bouncer

RHEL / CentOS / Amazon Linux

curl -s https://packagecloud.io/install/repositories/crowdsec/crowdsec/script.rpm.sh | sudo bash
yum install crowdsec-firewall-bouncer-iptables
systemctl enable crowdsec-firewall-bouncer
systemctl start crowdsec-firewall-bouncer

When installing crowdsec, “collections” of some systems that you have on your server are already pre-configured.

Run the following command and see which collections have been installed

cscli collections list

You will see something similar:

You will be able to install new collections, configurations or bouncers according to your needs through the website Hub do Crowdsec

This is one of the tools we use on our customers’ servers. Server management.

Any questions? leave it in the comments…