fail2ban Reporter

**Judgement:** A focused and practical tool for Linux admins running fail2ban who want automated reporting of abusive IPs to AbuseIPDB and Telegram alerting. It fits well into a command-line, self-managed server environment but is not a point-and-click solution for non-technical users. **Strengths & Benefits** - Automates the reporting of new fail2ban bans to AbuseIPDB, reducing manual security housekeeping work. - Integrates via a fail2ban action and simple Bash scripts, so it is lightweight and low-overhead. - Telegram notifications provide timely visibility into active attacks and bans. - Helper scripts cover common workflows: reporting current bans, checking IP reputation, and viewing ban stats. **Risks & Limitations** - **Privacy & compliance:** All banned IPs are sent to AbuseIPDB; this may raise legal/compliance concerns in some jurisdictions or organizations, especially if internal or misconfigured addresses are banned. - **False positives:** Any misconfiguration of fail2ban (overly aggressive rules, local subnets, VPN endpoints) will propagate those mistakes into AbuseIPDB, potentially harming legitimate users. - **Fixed abuse category:** The workflow mentions reporting with the SSH brute-force category, which may not accurately describe all jails/services you protect. - **Operational dependencies:** Requires a valid AbuseIPDB API key, a working fail2ban setup, and correct installation of the custom action; failures in any of these reduce effectiveness. **Recommended Scenarios** - Self-hosted VPS or dedicated servers where a sysadmin already uses fail2ban and wants to contribute data to AbuseIPDB while getting quick alerts. - Small hosting environments where automated abuse reporting and basic monitoring are more important than fine-grained incident response or strict privacy constraints. **Not Ideal For** - Environments with strict data protection/compliance requirements that prohibit sharing IP-level incident data with third-party services. - Teams that need granular control over abuse categories, complex workflows, or rich dashboards beyond what CLI scripts and logs provide.