Overview

f2b is lightweight automatic anti-bot turret for your public serivces.

Features:

• written in pure C
• small memory footprint
• minimum dependencies (required: libc, libdl; optional: readline, pcre, redis, ipset)
• fully modular: pluggable sources/filters/backends (you may easy write custom one)
• support for distributed installs (teamwork)
• stateful (can save/restore banned ips on restart)
• adapting to bots (automatically adjust bantime/findtime on rare but steady events from one source)
• can use not only logfiles, but anything that can give malicious ip: accept(), recv(), pubsub event, pipe
• may work as honeypot (emulating open tcp ports)

Docs:

• Installation -- generic installation instructions
• Quickstart -- config file description and configuration notes

Similar software:

• fail2ban
• sshguard

License: GPL2+