traffic-capture

## When to Use - Changing how the proxy forwards, captures, ingests, or replays traffic. The one-line "route every egress through the guard" rule is in the capture_proxy [AGENTS.md](../../scanners/capture_proxy/AGENTS.md) CRITICAL RULES; this skill is the mechanism. --- ## Critical Rules - **NEVER match the internal denylist on the hostname alone.** The guard denies on the **resolved IP** (RFC1918 and friends), because a hostname that resolves to an internal address (or re-resolves after a check) is the SSRF/DNS-rebinding case. See [scanners/capture_proxy/egress.py](../../scanners/capture_proxy/egress.py) (the block conditions operate on the resolved IP). - **NEVER build a replay/fuzz target from unvalidated LLM output and send it straight out.** The replay path is a new egress path; it must pass the same `EgressPolicy` guard as captured traffic, or the agent can be steered into an internal pivot. Args must not reach the wire un-guarded. - **NEVER remove a block condition to "make replay work".** Each condition is individually toggleable via `EgressPolicy` (surfaced in settings); loosen it there, per-condition, not by deleting the check. - **ALWAYS keep capture and ingest off the scan's critical path.** Capture writes an append-only spool; a separate worker tails it into Postgres ([scanners/capture_proxy/ingest_worker.py](../../scanners/capture_proxy/ingest_worker.py)). That decoupling is deliberate - capture must never block or slow the scan it observes. --- ## The capture pipeline | Stage | File | Note | | --- | --- | --- | | intercept | [capture_addon.py](../../scanners/capture_proxy/capture_addon.py) | mitmproxy addon; request/response hooks | | egress guard | [egress.py](../../scanners/capture_proxy/egress.py) | resolved-IP denylist + `EgressPolicy` toggles; the SSRF backstop | | ingest | [ingest_worker.py](../../scanners/capture_proxy/ingest_worker.py) | tails the spool -> Postgres; off the scan path | ## Commands ```bash docker compose --profile tools build capture-proxy # image rebuild (Dockerfile change) ./redamon.sh test unit # capture_proxy section ``` ## Resources - [docs/readmes/README.TRAFFIC.md](../../docs/readmes/README.TRAFFIC.md) - capture/replay/fuzz architecture and settings - Related: capture_proxy [AGENTS.md](../../scanners/capture_proxy/AGENTS.md) CRITICAL RULES (route egress through the guard)