CrowdSec Multi-Server Configuration

1. Install the main CrowdSec server

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

Set API Host

sudo vim /etc/crowdsec/config.yaml

api:
  server: true
  listen_url: 0.0.0.0:8080

Restart Crowdsec

sudo systemctl restart crowdsec

2. (Debian12) Install and configure Crowd agent on another service

Install Crowdsec

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

to uninstall

sudo apt-get remove --purge crowdsec

Copy config to disable lapi server on our agent

sudo cp /lib/systemd/system/crowdsec.service /etc/systemd/system/crowdsec.service

Edit service to disable api

vim /etc/systemd/system/crowdsec.service
ExecStart=/usr/bin/crowdsec -c /etc/crowdsec/config.yaml -no-api # <- add this arg

Register this agent to LAPI Crowdsec main server

sudo cscli lapi register -u http://<CROWDSEC_MAIN_SERVER>:8080 --machine YOUR-SRV-NAME

## Dont reload before approbation
sudo systemctl restart crowdsec

Accept this new agent on your main crowdsec server

Create a new boucner on your main crowdsec server and get another api key

Register this new bouncer on our agent

sudo vim /etc/crowdsec/bouncers/crowdsec-firewall-bouncer.yaml

...
api_url:
api_key: <YOUR_API__KEY HERE>

Restart your bouncer service

systemctl restart crowdsec-firewall-bouncer

2. (Windows) Install and configure Crowd agent on another service

install Crowdsec

Change Configuration

api>server

enable: false
listen_url: ... # remove/comment

Register this agent to LAPI Crowdsec main server

cscli lapi register - http://<CROWDSEC_MAIN_SERVER>:8080 --machine "YOUR-SRV-NAME"
Restart-Service crowdsec

3. Approve the new agent on the main server

Check

cscli machines list

Validate

cscli machines validate "YOUR-SRV-NANE"

Double check

cscli machines list

4. Set our new agent as bouncer on the main server

Add Bouncer

cscli bouncers add "YOUR-SRV-NAME-Bouncer" # youcan put  your custom bouncer here

At the end you will get an api key, you will need to configure the bouncer on our agent.

5. Register the bouncer api key on the agent.

Add our main server bouncer api key

config/bouncers/

api_endpoint: http://<YOUR_MAIN_SERVER_IP>:8080
api_key: <YOUR_API_KEY_HERE>

Reload your bouncer service

Restart-Service cs-windows-firewall-bouncer