S3 appendix CGNAT smoke test run live on felhom-pve (agent v0.64.0) with a
USB-tethered phone. Tunnel established + held its NAT mapping across a 32-min
idle soak on PersistentKeepalive=25 alone (0 stalls, final ping no-bounce).
- §7: open-validation CLOSED; two honest caveats kept (SIM had a public mobile
IPv4 so true CGNAT 100.64/10 not reproduced — retest-when-able; + MTU).
- §4.3: mobile outer path MTU ~1400 black-holed bulk data at the shipped 1420;
MTU 1340 restored the PBS page. OPEN DECISION: permanent vs per-connection.
- §4.4: keepalive 32-min mobile-NAT hold datapoint.
- §4.2: dual-stack v6 trap (wg-quick prefers endpoint AAAA, rides un-NATed v6).
- §8: S6 row CGNAT closure marked done.
- REPORT.md: overwritten with this operational-validation summary.
Runbook: RUNBOOK-s3-cgnat-smoke. Docs-only; no agent/hub/controller code.
Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01PSK5g6qYLknKj8u3QAFEr6
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