Fail2ban Migration Helper

One-click migration from existing fail2ban configs to lightweight single-binary alternatives

Problem

Ops engineers like fail2ban's log-to-ban model but dislike maintaining a Python runtime and regex attack surface. Someone already built fail2zig and specifically added config inspection and migration from fail2ban, proving there's real demand for migrating existing setups.

Solution

A cross-platform CLI/GUI that reads existing fail2ban jails, filters, and actions, parses and converts them into the target format, flags incompatible regex with suggestions, and produces a migration report plus rollback bundle.

Users

Sysadmins, SREs, small VPS providers

MVP

Parse fail2ban jail and filter configs; detect incompatible regex and suggest replacements; export target config; generate migration diff and rollback script

Revenue

Open-source core with paid migration report or batch migration service; charge per migrated node

Why now

Lightweight alternatives are emerging, and migration is the switching barrier; a single-purpose tool is a fast indie build