CrowdSec Windows Firewall Bouncer

CrowdSec Windows Firewall Bouncer 0.0.5, released by CrowdSecurity, is a lightweight security utility designed to integrate the collaborative CrowdSec threat-intelligence engine directly with the native Windows Defender Firewall. Once installed, the bouncer continuously consumes real-time block-lists generated by CrowdSec’s community-powered detection network and automatically injects the corresponding IP addresses, ranges, and country codes into the Windows Firewall’s inbound and outbound rule sets, instantly neutralizing scanners, brute-force bots, and other malicious actors before they reach the host. Typical deployment scenarios include hardening public-facing IIS or Apache servers, protecting Remote Desktop gateways, shielding game or voice servers, and adding an extra layer to SMB shares on workstations that occasionally operate outside the corporate VPN. Because the component operates at the kernel level through the built-in firewall, it adds no perceptible latency and requires no additional agents on protected services; administrators can still use familiar snap-ins such as wf.msc or PowerShell NetSecurity cmdlets to view, override, or audit the rules the bouncer creates. The 0.0.5 release is the first generally available build for Windows, offering a standalone MSI installer, silent command-line switches for mass rollout, automatic service recovery, and a concise YAML configuration file that lets operators define rule priority, logging verbosity, and update intervals. Logs are written to the Windows Event Viewer under the CrowdSecBouncer provider, making SIEM correlation straightforward. The software is classified under the “Firewall & Intrusion Prevention” category and is fully compatible with CrowdSec Agent v1.5.x and above on Windows 10, 11, and Server 2016/2019/2022. CrowdSec Windows Firewall Bouncer is available for free on get.nero.com, with downloads provided via trusted Windows package sources such as winget, always delivering the latest version and supporting batch installation of multiple applications.

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