CrowdSec is a security automation engine, using both local IP behavior detection & our community-driven IP reputation database.
Open Source Fail2ban AlternativesFirewalls and other similar apps like Fail2ban
The best open source alternative to Fail2ban is CrowdSec. It's not free, so if you're looking for a free alternative, you could try CrowdSec or SSHGuard. If that doesn't suit you, our users have ranked more than 10 alternatives to Fail2ban and 14 is open source so hopefully you can find a suitable replacement. Other interesting open source alternatives to Fail2ban are EvlWatcher, Cyberarms Intrusion Detection and Defense, Pyruse and reaction.
Alternatives list
- 7 CrowdSec alternatives
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.
Protected against RDP-Brute forcers. It installs a service which scans the event log for anomalies every 30 seconds (by default).


Out-of-the-box security for Remote Deskop, Exchange, OWA, SharePoint, CRM, generic IIS applications and many other server systems.
Cost / License
- Free
- Open Source
Alerts
- Discontinued
Platforms
- Windows

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
- 3 Sentry (Bruteforce attack blocker) alternatives
Prevents Brute Force Attacks Against SSH, FTP, SMTP and More.
wail2ban is a windows port of the basic functionality of fail2ban, and combining elements of ts_block.
IPQ BDB filtering is done by a user space netfilter daemon that issues verdicts after looking up the IP address in a Berkeley DB. The fuzzy blocking model, freely inspired by STOCKADE, is designed to block non-distributed dictionary attacks and mitigate spam.
- 18 SpyLog alternatives
Monitor logs from several sources and execute actions based on some rules. Can be used to protect against brute-force attacks.
Cost / License
- Free
- Open Source (MIT)
Platforms
- Windows
































Easier to configure, and no errors like Fail2Ban!