Observed arrival · 2026-10-18

moat: readable packet filters for XDP

moatfw.dev Visit website

Editorial interest 78/100 Selection signal · not a rating of the site

An open-source language and toolchain for writing, testing, and loading XDP packet filters as eBPF.

Landing page captured for the 2026-10-18 issue.

For: Linux operators writing XDP firewall or DDoS rules
Worth noticing: The site describes kernel-based packet tests with a simulated clock, plus pcap replay and a model mode for use without a kernel.

Field notes

The homepage lays out a three-step workflow: check a .moat rules file, test expected packet verdicts, then load it on a named interface. It describes tests using the kernel verifier and BPF_PROG_TEST_RUN, with a simulated clock or pcap replay; a model mode is offered when a kernel is unavailable. Deployment examples include audit mode, atomic reloads, and counters exposed through moat stats and Prometheus-ready metrics.

Observed signals

Read the marks

Editorial observations of this landing page, not a rating.

○OpenPublic substance visible

✦PrettyNotable craft visible

●ProPolished or operationally mature

◎NicheUnusually specific use

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