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6600f0d45f
When a peer that hosts the target of a private service dials its own service URL the request was being looped through the proxy and back over WireGuard to the same peer — twice the WG round-trip for no benefit, with no signal to the caller that something was wrong. Add isSelfTargetLoop to ReverseProxy.ServeHTTP: when the request arrived on the per-account overlay listener (IsOverlayOrigin) and the source tunnel IP matches the target host, refuse the request with 421 Misdirected Request and a body pointing the operator at the backend directly. The gate is scoped to overlay origin so requests on the public listener that happen to share a source IP with the target host are forwarded normally.