docker-mailserver/docs/content/examples/tutorials/crowdsec.md

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---
title: 'Tutorials | Crowdsec'
---
!!! quote "What is Crowdsec?"
Crowdsec is an open source software that detects and blocks attackers using log analysis.
It has access to a global community-wide IP reputation database.
[Source](https://www.crowdsec.net)
## Installation
Crowdsec supports multiple [installation methods][crowdsec-installation-docs], however this page will use the docker installation.
### Docker mailserver
In your `compose.yaml` for the DMS service, add a bind mount volume for `/var/log/mail`. This is to share the DMS logs to a separate crowdsec container.
!!! example
```yaml
services:
mailserver:
- /docker-data/dms/mail-logs/:/var/log/mail/
```
### Crowdsec
The crowdsec container should also bind mount the same host path for the DMS logs that was added in the DMS example above.
```yaml
services:
image: crowdsecurity/crowdsec
restart: unless-stopped
ports:
- "8080:8080"
- "6060:6060"
volumes:
- /docker-data/dms/mail-logs/:/var/log/dms:ro
- ./acquis.d:/etc/crowdsec/acquis.d
- crowdsec-db:/var/lib/crowdsec/data/
environment:
# These collection contains parsers and scenarios for postfix and dovecot
COLLECTIONS: crowdsecurity/postfix crowdsecurity/dovecot
TZ: Europe/Paris
volumes:
crowdsec-db:
```
## Configuration
Configure crowdsec to read and parse DMS logs file.
!!! example
Create the file `dms.yml` in `./acquis.d/`
```yaml
---
source: file
filenames:
- /var/log/dms/mail.log
labels:
type: syslog
```
!!! warning Bouncers
Crowdsec on its own is just a detection software, the remediation is done by components called bouncers.
This page does not explain how to install or configure a bouncer. It can be found in [crowdsec documentation][crowdsec-bouncer-docs].
[crowdsec-installation-docs]: https://doc.crowdsec.net/docs/getting_started/install_crowdsec
[crowdsec-bouncer-docs]: https://doc.crowdsec.net/docs/bouncers/intro