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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
iptablesFORWARD-chain manipulation, so a bug could impact Docker/host networking on Linux. Mitigated by only acting whenDOCKER-FORWARDexists and the jump is missing, but still warrants careful review/testing on varied firewall setups.Overview
Prevents host Docker networking from breaking when the
FORWARDchain gets flushed/rebuilt by re-adding the missing jump toDOCKER-FORWARDduring network initialization.Adds
ensureDockerForwardJump(withlastHypemanForwardRulePosition) to conditionally detect a presentDOCKER-FORWARDchain but missingFORWARDjump and re-insert it after hypeman-managed rules.Extends the Linux network integration test to delete the jump, re-run
networkManager.Initialize, and assert 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 fb37b52. This will update automatically on new commits. Configure here.