request echo shows exactly what the server received — headers, client address, body

// response appears here

why this matters for kanea testing

The headers block shows what kanea's eBPF datapath forwards: look for x-forwarded-for, x-forwarded-proto and hop headers to verify proxying. remoteAddress is the peer the server sees (the datapath, not your client). Send traffic through the service domain and compare with a direct hit.