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iptables refuses a DNAT to ip:port unless the same rule names the
protocol, so every per-port chain's DNAT now has -p. Live on the SG
cluster the first sync (no endpoints yet) applied; every later one failed
with "Need TCP, UDP, SCTP or DCCP with port specification" and left the
chains empty. The unit test now rejects any DNAT line without its
protocol; the rendered nat and mangle payloads were also checked with the
nodes' own iptables-restore --test (nf_tables).
reweave/test/lb/run.sh is the end-to-end test: from outside, both a pod on
the holder and one on another node see the client's own address; status
is [{ip, ipMode: Proxy}] and kube-proxy has nothing for the address; a pod
on a third node reaches it; an unheld address clears the status and stops
the forward; deleting the Services removes the holder's chains.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01UHXzGrsxfkGk8LmwrBbHNZ