{
           "name": "envoy.filters.network.tcp_proxy",
           "typed_config": {
            "@type": "type.googleapis.com/envoy.extensions.filters.network.tcp_proxy.v3.TcpProxy",
            "stat_prefix": "PassthroughCluster",
            "cluster": "PassthroughCluster"
           }
          }
         ],
         "name": "virtualOutbound-catchall-tcp"
        }
       ],

client protocol will be preserved while initiating connection to backend. type: boolean type: object tcp: description: Settings common to both HTTP and TCP upstream connections. properties: connectTimeout: description: TCP connection timeout. type: string maxConnectionDuratio: description: The maximum duration of a connection. type: string maxConnections: description: Maximum number of HTTP1 /TCP connections to a destination host. format: int32 type: integer tcpKeepalive: description: If set then...

            "uid": "${datasource}"
          },
          "expr": "sum(irate(istio_tcp_received_bytes_total{reporter=~\"$qrep\", destination_service=~\"$service\"}[1m]))",
          "format": "time_series",
          "hide": false,
          "intervalFactor": 1,
          "legendFormat": "",
          "refId": "A"
        }
      ],
      "title": "TCP Received Bytes",
      "type": "stat"
    },
    {
      "datasource": {

          "datasource": {
            "type": "prometheus",
            "uid": "${datasource}"
          },
          "expr": "sum(irate(istio_tcp_sent_bytes_total{reporter=~\"$qrep\", destination_workload_namespace=~\"$namespace\", destination_workload=~\"$workload\"}[1m])) + sum(irate(istio_tcp_received_bytes_total{reporter=~\"$qrep\", destination_workload_namespace=~\"$namespace\", destination_workload=~\"$workload\"}[1m]))",