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**Fixed (2):** - **"Hypeman rule scan may miss comments"** — Added `-v` flag to the `iptables -L` call in `lastHypemanForwardRulePosition`, matching what `isForwardRuleCorrect` already does. Without `-v`, some iptables versions don't show comment text. - **"Test can leave host iptables modified"** — Added a `t.Cleanup` that checks if the DOCKER-FORWARD jump is missing and restores it, so a mid-test failure won't leave the host broken. **Dismissed with inline comments (2):** - **"Docker jump may bypass DOCKER-USER rules"** — Added a comment on `ensureDockerForwardJump` explaining that it only inserts when the jump is completely absent (the `-C` check returns early otherwise), so it can't reorder existing Docker rules. - **"Docker iptables test lacks privilege guard"** — Added a comment on the test explaining that `make test-linux` runs the entire suite under `sudo`, so iptables permissions are always available.
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Note
Medium Risk
Touches host
iptablesFORWARDchain behavior and inserts rules, which can impact system/container networking if detection or insertion position is wrong; changes are guarded to be a no-op when Docker isn’t present and only act when the jump is missing.Overview
During Linux bridge iptables setup, the network manager now detects when Docker’s
DOCKER-FORWARDchain exists but theFORWARD -> DOCKER-FORWARDjump was wiped, and re-inserts the jump immediately after the lasthypeman-FORWARD rule.Adds an integration subtest (
DockerForwardChainRestored) that deletes the jump viaiptables, re-runs network initialization, and asserts the jump is restored (skipping when Docker isn’t running and cleaning up to avoid leaving the host misconfigured).Written by Cursor Bugbot for commit e654cd0. This will update automatically on new commits. Configure here.