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ubuntu-post-install/docs
Claude 5c18cfa364 Add SMS test reminder, "which box handled it" note, and a coturn health check
Three follow-ups from live testing on this session's actual VPS:

- tools/pstn-test-check.sh's SMS section printed the Forward-to-URL value
  to configure but never said what to do next — add the "text this DID,
  then watch journalctl -u sms-inbound -f" step right after it.
- docs/pstn-sms-test-checklist.md: the "which box actually handled this"
  question has a simple answer (a DID's inbound routing targets exactly
  one IP:port, so there's no ambiguity to resolve, only a portal setting
  to confirm) — written up so it doesn't need re-deriving. Also fixed the
  --list example to cd into the repo first; ./setup.sh is a relative path
  and silently fails with "command not found" from any other directory,
  confirmed live in this session.
- New tools/coturn-test-check.sh: health-checks the shared coturn instance
  (services/coturn.sh) and every consumer registered against it (Asterisk,
  any number of Mattermost instances) — container/identity, each cached
  consumer credential cross-checked against coturn's own live user
  database (catches the container/volume-recreated-without-db drift case),
  UFW rules for both the TURN port and the relay range, a capacity
  explanation reasoned from the actual port-range math instead of a guess,
  and a real TURN allocation test per consumer via turnutils_uclient —
  the only way to prove credentials + port range + firewall all actually
  work together, not just that each looks right in isolation. Deliberately
  does not attempt a concurrent load test, since that would consume real
  relay ports other services may be actively using.

Verified the turnadmin -l output parsing, UFW rule matching, and the
empty-array-under-set–u loop pattern against mock data before shipping.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
Claude-Session: https://claude.ai/code/session_01H4k6J1qXXyYxhGEgnJaMvn
2026-08-11 20:32:02 +00:00
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