CrowdSec is a security automation engine, using both local IP behavior detection & our community-driven IP reputation database.
reaction AlternativesFirewalls and other similar apps like reaction
reaction is described as 'Inspired by the honorable Fail2ban, it intend to provide a more lightweight (CPU wise) alternative, easy to configure and well documented' and is a Firewall in the security & privacy category. There are nine alternatives to reaction for Linux, Windows, Self-Hosted, Mac and Web-based. The best reaction alternative is CrowdSec. It's not free, so if you're looking for a free alternative, you could try CrowdSec or Fail2ban. Other great apps like reaction are IPBanPro, Denyhosts, SpyLog and tallow.
Alternatives list
- 5 CrowdSec alternatives
- 21 Fail2ban alternatives
Fail2ban scans log files (e.g. /var/log/apache/error_log) and bans IPs that show the malicious signs -- too many password failures, seeking for exploits, etc. Generally Fail2Ban is then used to update firewall rules to reject the IP addresses for a specified amount of time...

SSHGuard monitors services through their logging activity. It reacts to messages about dangerous activity by blocking the source address with the local firewall. SSHGuard employs a clever parser that can transparently recognize several logging formats at once (syslog, syslog-ng...
IPBan is a FREE and open source application that allows auto banning ip addresses from failed login attempts. Many sources are watched such as SSH, SMTP, SQL-Server, MySQL, RDP and dropped packets.
The idea of denying access to SSH servers is nothing new and I was inspired by many other scripts that I discovered. However, none of them did things the way I envisioned them to. Also, they were all shell scripts which do not offer the elegance of Python.
Cost / License
- Free
- Open Source
Platforms
- Linux
HeatShield is a network firewall management service for Linux servers. A firewall configured by HeatShield prevents unauthorized access to services running on your servers, such as SSH and MySQL. Using HeatShield, you can easily restrict access to these services so that only IP...





















