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feat!: rewrite the backend in Rust (remove Go) - #80
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September 29, 2026 12:23
A per-IP flood (DDoS001) now bans the source address for ddos.ban_seconds (default 10m), and an address that keeps producing bot-like requests is banned too. Bans are time-limited, reversible, logged, and raise an alert; loopback and trusted-proxy addresses are never auto-banned. The ban request survives into the final decision — a high accumulated score used to turn a flood into a plain challenge and drop the ban. Missing User-Agent (BOT001) is now challenged instead of only monitored. DDoS and bot thresholds are configurable, and a negative ban value disables auto-ban. The client IP is read from CF-Connecting-IP when the peer is a trusted proxy, so behind Cloudflare the WAF sees the real visitor rather than the Cloudflare edge; rate limits, auto-bans, and the audit log are accurate. Verified live: a 40-request burst through the public host banned the source with "DDoS001 HTTP Flood - IP" for 10m and surfaced it in /api/v1/bans.
The API base is now the relative "/api/v1", so new URL() threw and the CSP became "connect-src 'self' /api/v1" — a path is not a valid CSP source, so the browser logged an error and ignored it. Only add an origin when the base is an absolute URL; a relative base is covered by 'self'.
Replaces the Go backend (cmd/, internal/) with a cargo workspace under rust/ containing the whole product as five crates: core (detection engine and all 25 inspectors), config (YAML with defaults, validation, hot reload), services (ratelimit, blocklist, session, geo, reputation, siem, ml, tenant, sites, billing, compliance, traincorpus, uaparse), proxy (WAF pipeline, admin API, TLS, hyper servers, binary), and ctl (fortressctl + healthcheck). Behaviour is preserved, not reinterpreted: rule IDs, scores, decision ordering, threshold semantics, and config defaults match, and several original bugs are reproduced on purpose. Detection parity is enforced by rust/crates/proxy/tests/attack_corpus.rs, which replays the training corpus and fails if any category drops below its documented floor, with zero false positives on the benign corpus. TLS termination is implemented with rustls (cert/key, min version, optional mTLS, ALPN http/1.1). Prometheus /metrics is served on its own listener. Every intentional difference is documented in rust/DEVIATIONS.md. Build infrastructure is now Rust end to end: Dockerfile (rust:1-slim -> distroless), Makefile, all GitHub Actions workflows (ci, benchmark, release, security), install.sh, and .pre-commit-config.yaml (cargo fmt + cargo clippy). Verification (measured): - cargo test --workspace --locked: 288 passed, 0 failed - cargo clippy --workspace --all-targets --locked -- -D warnings: clean - cargo fmt --check: clean - cargo build --release --locked: clean (fortresswaf, fortressctl, healthcheck) - live: HTTPS request blocked with 403 + X-FortressWAF-Rule: SQLI016 Removed: cmd/, internal/, tests/*.go, tools/, go.mod, go.sum, .golangci.yml, benchmark.txt. tests/attack-corpus/ is kept (consumed by the parity test). BREAKING CHANGE: the backend is now Rust; the Go module and its toolchain are gone.
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Added AGENTS.md and skills/fortresswaf-rust-backend — agent instructions for this repo. Rust jobs unaffected (docs-only commit). |
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Summary
Replaces the Go backend with a Rust cargo workspace under
rust/, and removes the Go implementation entirely. The Dockerfile,Makefile, CI workflows,install.sh, and pre-commit config now build and lint Rust.The whole product is five crates:
coreEnginepipeline, all 25 inspectorsconfigservicesproxyfortresswafbinaryctlfortressctlCLI +healthcheckBehaviour
Preserved, not reinterpreted: rule IDs, scores, decision ordering, threshold semantics, and config defaults match the original. Several original bugs are reproduced on purpose (documented in
rust/DEVIATIONS.md). Detection parity is enforced byrust/crates/proxy/tests/attack_corpus.rs, which replays the training corpus and fails the build if any category drops below its documented floor, with zero false positives on the benign corpus.TLS termination is implemented with
rustls(cert/key, min version, optional mTLS, ALPN http/1.1). Prometheus/metricsis served on its own listener. ACME auto-provisioning is the one remaining gap, called out in the README.Verification (measured locally)
cargo test --workspace --locked— 288 passed, 0 failedcargo clippy --workspace --all-targets --locked -- -D warnings— cleancargo fmt --check— cleancargo build --release --locked— clean (fortresswaf,fortressctl,healthcheck)403+X-FortressWAF-Rule: SQLI016; admin/health200; authenticated/api/v1/status200Detection rates replay to the documented floors: XXE 100%, XSS 99.3%, deserialization 97.1%, webshell 80%, path-traversal 86.7%, SQLi 67.3%.
Removed
cmd/,internal/,tests/*.go,tools/,go.mod,go.sum,.golangci.yml,benchmark.txt.tests/attack-corpus/is kept — the parity test consumes it.Breaking change
The backend is now Rust; the Go module and its toolchain are gone.