Scenarios are written in YAML to make them as simple and readable as possible without sacrificing granularity. The tool uses leaky buckets internally to allow for tight event control. To achieve this, it's "decoupled," meaning you can "detect here" (e.g., in your database logs) and "remedy there" (e.g., in your firewall or rproxy). The solution recently turned 1.x, introducing a major architectural change: the introduction of a local REST API.ĬrowdSec is written in Golang and was designed to run on modern, complex architectures such as clouds, lambdas, and containers. Second because the crowd is key to the mass hacking plague and open source is the best lever to create a community and have people bring their knowledge to contribute to the project and make it better. First because they have been working on open source projects for decades. It was clear to the founders that open source was going to be one of the main pillars of CrowdSec. Ultimately, CrowdSec leverages the power of the crowd to create an extremely accurate IP reputation system that benefits all its users. As for the IP that aggressed your machine, you can choose to remedy the threat in any manner you feel appropriate. The goal is to leverage the crowd power to create a real-time IP reputation database. If this signal passes the curation process, the IP is then redistributed to all users sharing a similar technological profile to “immunize” them against this IP. If your agent detects such aggression, the offending IP is then dealt with and sent for curation. It is using a behavior analysis system to qualify whether someone is trying to hack you, based on your logs. It was inspired by Fail2Ban and aims to be a modernized, collaborative version of that intrusion-prevention tool.ĬrowdSec is free and open source (under an MIT License), with the source code available on GitHub. CrowdSec is a massively multiplayer firewall designed to protect Linux servers, services, containers, or virtual machines exposed on the internet with a server-side agent.
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