 proxy (Envoy).</p><div><aside class="callout warning"><div class=type><svg class="large-icon"><use xlink:href="/v1.21/img/icons.svg#callout-warning"/></svg></div><div class=content>To avoid port conflicts with sidecars, applications should not use any of the ports used by Envoy.</div></aside></div><table><thead><tr><th>Port</th><th>Protocol</th><th>Description</th><th>Pod-internal only</th></tr></thead><tbody><tr><td>15000</td><td>TCP</td><td>Envoy admin port (commands/diagnostics)</td><td>Yes</td></tr><tr