Envoy proxy HTTP to TCP

[Everton Morais]

Hello, I've set up an envoy proxy to receive HTTP requests and forward them over TCP. The communication is successful, but the behavior is not okay. After Envoy forwards the data to the TCP server, Envoy sends a .FIN to the server, which responds with an ACK. The expectation is that the connection would be maintained so that the TCP server can return a response. I have changed various connection timeout parameters, but none have been successful. Does anyone have a solution for this case?

admin: address: socket_address: protocol: TCP address: 127.0.0.1 port_value: 9902 static_resources: listeners: - name: listener_0 address: socket_address: address: 0.0.0.0 port_value: 10000 filter_chains: - filters: - name: envoy.filters.network.http_connection_manager typed_config: "@type": type.googleapis.com/envoy.extensions.filters.network.http_connection_manager.v3.HttpConnectionManager stat_prefix: ingress_http route_config: name: local_route virtual_hosts: - name: local_service domains: - "*" routes: - match: prefix: "/" headers: - name: ":method" string_match: exact: "POST" route: cluster: service upgrade_configs: - upgrade_type: CONNECT connect_config: allow_post: true http_filters: - name: envoy.filters.http.router typed_config: "@type": type.googleapis.com/envoy.extensions.filters.http.router.v3.Router http2_protocol_options: allow_connect: true clusters: - name: service connect_timeout: 0.25s type: LOGICAL_DNS dns_lookup_family: V4_ONLY lb_policy: ROUND_ROBIN load_assignment: cluster_name: service endpoints: - lb_endpoints: - endpoint: address: socket_address: address: 192.168.0.31 port_value: 13370