Quick comparison
| Area | Vexyl Guard | Fail2Ban |
|---|---|---|
| Primary model | Weighted scoring and category correlation across supported local logs | Filters and jails that match log activity and trigger configured actions |
| Default after install | Monitor mode; no automatic firewall enforcement by default | Depends on package and jail configuration; enabled jails can ban matching sources |
| Log scope | Authentication, web, mail, firewall, VPN, database, storage, and edge formats currently supported by the agent | Extensible filters for services that write matchable logs |
| Response | Optional local nftables or iptables blocks after threshold | Configurable actions, commonly firewall bans |
| AI-related coverage | Prompt-probe classification, rapid mutation signal, and optional local AI runtime scoring | Not a stated core focus of Fail2Ban |
| Shared intelligence | Optional Vexyl console and signed policy workflows | Not a core community intelligence exchange |
| Project maturity | Public preview | Long-running, widely deployed open-source project |
Choose Fail2Ban when
- You want a mature, widely understood jail-and-filter model.
- Your main requirement is banning repeated failures from specific services.
- You already have tested filters and operational experience with Fail2Ban.
- You need its broader ecosystem of existing service configurations.
Evaluate Vexyl Guard when
- You want monitor mode before local firewall action.
- You want one score path across several supported server log categories.
- You operate AI-backed applications or want to evaluate redacted AI runtime events locally.
- You value signed package repositories, configuration preflight, and a public source path designed for a small exposed host.
Can they run together?
Potentially, but two tools changing firewall rules can complicate investigation and recovery. Start Vexyl Guard in monitor mode, inspect both tools' outputs, and define clear ownership before allowing more than one component to enforce network blocks.
Read both projects
This page is published by Vexyl Labs and should not be your only source. Review the Fail2Ban source and project documentation, then inspect the Vexyl Guard source.