Post-deploy verification of the go endpoint showed every anonymous caller
keyed as "unknown": Flex Consumption does not surface X-Forwarded-For to
the isolated worker, so ALL per-IP rate-limit buckets (bootstrap-validate,
distress, diag-ticket-download, stats/platform) had silently collapsed
into one shared bucket — confirmed by DistressReports.SourceIp being
"unknown" across the board.
- GetTrustedClientIp falls back to HttpContext.Connection.RemoteIpAddress
(transport-derived, unspoofable; IPv4-mapped addresses normalized).
Heals every existing caller without signature changes.
- New GetRateLimitClientIp for AFD-fronted endpoints: honors
X-Azure-ClientIP only when X-Azure-FDID carries exactly our profile ID
(FrontDoorProfileId app setting, set on autopilotmonitor-api-eu);
fail-closed to GetTrustedClientIp on unset/mismatch/multi-value.
Used by GetBootstrapScriptFunction (traffic arrives via
go.autopilotmonitor.com, where the trusted hop is AFD egress).
- FdidMatches table tests incl. append/spoof cases.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
The portal's Next.js /go/[code] route was the web app's only request-time
server code and blocked the planned static export. The script generation
now lives in the Function App as GET /api/bootstrap/go/{code}
(GetBootstrapScriptFunction), reached by customers as
irm https://go.autopilotmonitor.com/{code} | iex via a Front Door custom
domain whose /* route rewrites onto the API path.
- New Constants.BootstrapGoBaseUrl; CreateBootstrapSessionFunction now
hands out the go URL (previously unguarded — CreateBootstrapSessionUrlShapeTests
pins it now). go host added to both URL-guard enforced lists.
- BootstrapScriptValueValidator ports the bootstrapValidation.ts injection
invariants (exact GUIDs, https + host allowlist + /agent/*.zip path,
expiry <= 14d) as defense-in-depth for in-process values.
- OobeBootstrapScriptGenerator ports the PS template as a Replace-token
raw string; golden test pins byte parity with the TS template
(TestData/oobe-bootstrap-golden.ps1, captured from route.ts).
- Always-HTTP-200 text/plain contract incl. rate limit (own bucket
bootstrap-script:{ip} 20/min); disabled tenant indistinguishable from
unknown code. Catalog: PublicAnonymous; NoStoreCacheMiddleware covers
/api/bootstrap/go/ (script inlines the bearer token).
- Web: BOOTSTRAP_GO_URL registry entry, sessions list shows the go host,
legacy route marked LEGACY (alive for pre-migration URLs <= 168h,
removal in the static-export PR).
- Docs: new OKF backend/oobe-bootstrap-go-flow.md, url-registry go
section, index/log entries.
Backend tests 3611/3611, web vitest 651/651, tsc clean.
Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>
Oliver Kieselbach